Fix existing and add missing osx-specific key shortcuts

src/Avalonia.Native/AvaloniaNativePlatform.cs

@@ -109,10 +109,16 @@ namespace Avalonia.Native
                 .Bind<IRenderLoop>().ToConstant(new RenderLoop())
                 .Bind<IRenderTimer>().ToConstant(new DefaultRenderTimer(60))
                 .Bind<ISystemDialogImpl>().ToConstant(new SystemDialogs(_factory.CreateSystemDialogs()))
-                .Bind<PlatformHotkeyConfiguration>().ToConstant(new PlatformHotkeyConfiguration(KeyModifiers.Meta))
+                .Bind<PlatformHotkeyConfiguration>().ToConstant(new PlatformHotkeyConfiguration(KeyModifiers.Meta, wholeWordTextActionModifiers: KeyModifiers.Alt))
                 .Bind<IMountedVolumeInfoProvider>().ToConstant(new MacOSMountedVolumeInfoProvider())
                 .Bind<IPlatformDragSource>().ToConstant(new AvaloniaNativeDragSource(_factory));
 
+            var hotkeys = AvaloniaLocator.Current.GetService<PlatformHotkeyConfiguration>();
+            hotkeys.MoveCursorToTheStartOfLine.Add(new KeyGesture(Key.Left, hotkeys.CommandModifiers));
+            hotkeys.MoveCursorToTheStartOfLineWithSelection.Add(new KeyGesture(Key.Left, hotkeys.CommandModifiers | hotkeys.SelectionModifiers));
+            hotkeys.MoveCursorToTheEndOfLine.Add(new KeyGesture(Key.Right, hotkeys.CommandModifiers));
+            hotkeys.MoveCursorToTheEndOfLineWithSelection.Add(new KeyGesture(Key.Right, hotkeys.CommandModifiers | hotkeys.SelectionModifiers));
+            
             if (_options.UseGpu)
             {
                 try