Merge branch 'master' into numerge

native/Avalonia.Native/src/OSX/gl.mm

@@ -208,9 +208,8 @@ public:
     
     virtual ~AvnGlRenderingSession()
     {
-        glFlush();
         [_context flushBuffer];
-        [_context setView:nil];
+        [NSOpenGLContext clearCurrentContext];
         CGLUnlockContext([_context CGLContextObj]);
         [_view unlockFocus];
     }
@@ -241,9 +240,8 @@ public:
         auto gl = _context;
         CGLLockContext([_context CGLContextObj]);
         [gl setView: _view];
+        [gl update];
         [gl makeCurrentContext];
-        auto frame = [_view frame];
-        
         *ret = new AvnGlRenderingSession(_window, _view, gl);
         return S_OK;
     }

src/Avalonia.Controls/Button.cs

@@ -253,10 +253,8 @@ namespace Avalonia.Controls
                 IsPressed = false;
                 e.Handled = true;
 
-                var hittest = this.GetVisualsAt(e.GetPosition(this));
-
                 if (ClickMode == ClickMode.Release &&
-                    hittest.Any(c => c == this || (c as IStyledElement)?.TemplatedParent == this))
+                    this.GetVisualsAt(e.GetPosition(this)).Any(c => this == c || this.IsVisualAncestorOf(c)))
                 {
                     OnClick();
                 }