WX: HiDPI: FrameAUI / Debugger

Changes:
  - MemoryWindow was cleaned up and gives more feedback on searches.

Some bugs were fixed as well:
  - A complex bug that allowed tearing off tabs and opening multiple
    copies of a debug panel which lead to segfaults
  - Another segfault related to right-click menus on code/memory views
    when those tools were floating in their own window.

Source/Core/DolphinWX/Debugger/WatchView.h

@@ -37,7 +37,7 @@ class CWatchView : public wxGrid
 {
 public:
   CWatchView(wxWindow* parent, wxWindowID id = wxID_ANY);
-  void Update() override;
+  void Repopulate();
 
 private:
   void OnMouseDownR(wxGridEvent& event);