Don't pass keyboard events to internal windows outside the screen geometry

PresentWindows moves the close button outside the visible area. We
don't want that one to take all key events.

input.cpp

@@ -401,6 +401,9 @@ class InternalWindowEventFilter : public InputEventFilter {
                 if (!w->isVisible()) {
                     continue;
                 }
+                if (!screens()->geometry().contains(w->geometry())) {
+                    continue;
+                }
                 found = w;
                 break;
             }