Updated obsolete API usages in interfaces.

src/Avalonia.Input/FocusManager.cs

@@ -56,11 +56,11 @@ namespace Avalonia.Input
         /// </summary>
         /// <param name="control">The control to focus.</param>
         /// <param name="method">The method by which focus was changed.</param>
-        /// <param name="modifiers">Any input modifiers active at the time of focus.</param>
+        /// <param name="keyModifiers">Any key modifiers active at the time of focus.</param>
         public void Focus(
             IInputElement control, 
             NavigationMethod method = NavigationMethod.Unspecified,
-            InputModifiers modifiers = InputModifiers.None)
+            KeyModifiers keyModifiers = KeyModifiers.None)
         {
             if (control != null)
             {
@@ -70,7 +70,7 @@ namespace Avalonia.Input
                 if (scope != null)
                 {
                     Scope = scope;
-                    SetFocusedElement(scope, control, method, modifiers);
+                    SetFocusedElement(scope, control, method, keyModifiers);
                 }
             }
             else if (Current != null)
@@ -98,7 +98,7 @@ namespace Avalonia.Input
         /// <param name="scope">The focus scope.</param>
         /// <param name="element">The element to focus. May be null.</param>
         /// <param name="method">The method by which focus was changed.</param>
-        /// <param name="modifiers">Any input modifiers active at the time of focus.</param>
+        /// <param name="keyModifiers">Any key modifiers active at the time of focus.</param>
         /// <remarks>
         /// If the specified scope is the current <see cref="Scope"/> then the keyboard focus
         /// will change.
@@ -107,7 +107,7 @@ namespace Avalonia.Input
             IFocusScope scope,
             IInputElement element,
             NavigationMethod method = NavigationMethod.Unspecified,
-            InputModifiers modifiers = InputModifiers.None)
+            KeyModifiers keyModifiers = KeyModifiers.None)
         {
             Contract.Requires<ArgumentNullException>(scope != null);
 
@@ -126,7 +126,7 @@ namespace Avalonia.Input
 
             if (Scope == scope)
             {
-                KeyboardDevice.Instance?.SetFocusedElement(element, method, modifiers);
+                KeyboardDevice.Instance?.SetFocusedElement(element, method, keyModifiers);
             }
         }
 
@@ -198,7 +198,7 @@ namespace Avalonia.Input
                 {
                     if (element is IInputElement inputElement && CanFocus(inputElement))
                     {
-                        Instance?.Focus(inputElement, NavigationMethod.Pointer, ev.InputModifiers);
+                        Instance?.Focus(inputElement, NavigationMethod.Pointer, ev.KeyModifiers);
 
                         break;
                     }

src/Avalonia.Input/IFocusManager.cs

@@ -23,11 +23,11 @@ namespace Avalonia.Input
         /// </summary>
         /// <param name="control">The control to focus.</param>
         /// <param name="method">The method by which focus was changed.</param>
-        /// <param name="modifiers">Any input modifiers active at the time of focus.</param>
+        /// <param name="keyModifiers">Any key modifiers active at the time of focus.</param>
         void Focus(
-            IInputElement control, 
+            IInputElement control,
             NavigationMethod method = NavigationMethod.Unspecified,
-            InputModifiers modifiers = InputModifiers.None);
+            KeyModifiers keyModifiers = KeyModifiers.None);
 
         /// <summary>
         /// Notifies the focus manager of a change in focus scope.

src/Avalonia.Input/IKeyboardDevice.cs

@@ -66,6 +66,6 @@ namespace Avalonia.Input
         void SetFocusedElement(
             IInputElement element, 
             NavigationMethod method,
-            InputModifiers modifiers);
+            KeyModifiers modifiers);
     }
 }

src/Avalonia.Input/IKeyboardNavigationHandler.cs

@@ -22,10 +22,10 @@ namespace Avalonia.Input
         /// </summary>
         /// <param name="element">The current element.</param>
         /// <param name="direction">The direction to move.</param>
-        /// <param name="modifiers">Any input modifiers active at the time of focus.</param>
+        /// <param name="keyModifiers">Any key modifiers active at the time of focus.</param>
         void Move(
             IInputElement element, 
             NavigationDirection direction,
-            InputModifiers modifiers = InputModifiers.None);
+            KeyModifiers keyModifiers = KeyModifiers.None);
     }
-}
+}

src/Avalonia.Input/KeyboardDevice.cs

@@ -38,7 +38,7 @@ namespace Avalonia.Input
         public void SetFocusedElement(
             IInputElement element, 
             NavigationMethod method,
-            InputModifiers modifiers)
+            KeyModifiers keyModifiers)
         {
             if (element != FocusedElement)
             {
@@ -56,7 +56,7 @@ namespace Avalonia.Input
                 {
                     RoutedEvent = InputElement.GotFocusEvent,
                     NavigationMethod = method,
-                    InputModifiers = modifiers,
+                    KeyModifiers = keyModifiers,
                 });
             }
         }

src/Avalonia.Input/KeyboardNavigationHandler.cs

@@ -94,11 +94,11 @@ namespace Avalonia.Input
         /// </summary>
         /// <param name="element">The current element.</param>
         /// <param name="direction">The direction to move.</param>
-        /// <param name="modifiers">Any input modifiers active at the time of focus.</param>
+        /// <param name="keyModifiers">Any key modifiers active at the time of focus.</param>
         public void Move(
             IInputElement element, 
             NavigationDirection direction,
-            InputModifiers modifiers = InputModifiers.None)
+            KeyModifiers keyModifiers = KeyModifiers.None)
         {
             Contract.Requires<ArgumentNullException>(element != null);
 
@@ -109,7 +109,7 @@ namespace Avalonia.Input
                 var method = direction == NavigationDirection.Next ||
                              direction == NavigationDirection.Previous ?
                              NavigationMethod.Tab : NavigationMethod.Directional;
-                FocusManager.Instance.Focus(next, method, modifiers);
+                FocusManager.Instance.Focus(next, method, keyModifiers);
             }
         }
 
@@ -126,7 +126,7 @@ namespace Avalonia.Input
             {
                 var direction = (e.KeyModifiers & KeyModifiers.Shift) == 0 ?
                     NavigationDirection.Next : NavigationDirection.Previous;
-                Move(current, direction, e.Modifiers);
+                Move(current, direction, e.KeyModifiers);
                 e.Handled = true;
             }
         }

src/Windows/Avalonia.Win32.Interop/WinForms/WinFormsAvaloniaControlHost.cs

@@ -45,7 +45,7 @@ namespace Avalonia.Win32.Embedding
                 focused = focused.VisualParent;
 
             if (focused == _root)
-                KeyboardDevice.Instance.SetFocusedElement(null, NavigationMethod.Unspecified, InputModifiers.None);
+                KeyboardDevice.Instance.SetFocusedElement(null, NavigationMethod.Unspecified, KeyModifiers.None);
         }
 
         private void PlatformImpl_LostFocus()

src/Windows/Avalonia.Win32/Input/WindowsKeyboardDevice.cs

@@ -47,7 +47,7 @@ namespace Avalonia.Win32.Input
 
         public void WindowActivated(Window window)
         {
-            SetFocusedElement(window, NavigationMethod.Unspecified, InputModifiers.None);
+            SetFocusedElement(window, NavigationMethod.Unspecified, KeyModifiers.None);
         }
 
         public string StringFromVirtualKey(uint virtualKey)

tests/Avalonia.Input.UnitTests/KeyboardDeviceTests.cs

@@ -35,7 +35,7 @@ namespace Avalonia.Input.UnitTests
             target.SetFocusedElement(
                 focused.Object,
                 NavigationMethod.Unspecified,
-                InputModifiers.None);
+                KeyModifiers.None);
 
             target.ProcessRawEvent(
                 new RawKeyEventArgs(
@@ -75,7 +75,7 @@ namespace Avalonia.Input.UnitTests
             target.SetFocusedElement(
                 focused.Object,
                 NavigationMethod.Unspecified,
-                InputModifiers.None);
+                KeyModifiers.None);
 
             target.ProcessRawEvent(
                 new RawTextInputEventArgs(