Merge pull request #9216 from mono/pr-anvod-solutionpadfocus

Fixes 1007912: Keyboard focus isn't given to Solution pad

Author: sandyarmstrong

main/src/core/MonoDevelop.Ide/MonoDevelop.Components/Mac/GtkNSViewHost.cs

@@ -331,7 +331,7 @@ protected override bool OnFocusOutEvent (Gdk.EventFocus evnt)
 			try {
 				if (view?.Window?.FirstResponder is NSView firstResponder &&
 					view?.AncestorSharedWithView (firstResponder) == view)
-					firstResponder.Window?.MakeFirstResponder (null);
+					firstResponder.Window?.MakeFirstResponder (firstResponder.Window.ContentView);
 				return base.OnFocusOutEvent (evnt);
 			} finally {
 				LogExit ();