Revert mouse event on layout (#750)

* Back out "fix update views (#748)"

This backs out commit e8e283b.

* Back out "Update which views are hovered after every re-layout (#747)"

This backs out commit 0a18dcf.

src/window_handle.rs

@@ -771,10 +771,6 @@ impl WindowHandle {
                 if self.needs_layout() {
                     paint = true;
                     self.layout();
-                    self.event(Event::PointerMove(PointerMoveEvent {
-                        pos: self.cursor_position,
-                        modifiers: self.modifiers,
-                    }));
                 }
 
                 if self.app_state.request_compute_layout {