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/LogWindow.h

@@ -28,7 +28,11 @@ public:
   CLogWindow(CFrame* parent, wxWindowID id = wxID_ANY, const wxPoint& pos = wxDefaultPosition,
              const wxSize& size = wxDefaultSize, long style = wxTAB_TRAVERSAL,
              const wxString& name = _("Log"));
+  ~CLogWindow() override;
 
+  // Listeners must be removed explicitly before the window is closed to prevent crashes on OS X
+  // when closing via the Dock. (The Core is probably being shutdown before the window)
+  void RemoveAllListeners();
   void SaveSettings();
   void Log(LogTypes::LOG_LEVELS, const char* text) override;
 
@@ -42,6 +46,7 @@ private:
   LogManager* m_LogManager;
   std::queue<std::pair<u8, wxString>> msgQueue;
   bool m_writeFile, m_writeWindow, m_LogAccess;
+  bool m_has_listeners = false;
 
   // Controls
   wxBoxSizer* sBottom;
@@ -57,11 +62,9 @@ private:
   void CreateGUIControls();
   void PopulateBottom();
   void UnPopulateBottom();
-  void OnClose(wxCloseEvent& event);
   void OnFontChange(wxCommandEvent& event);
   void OnWrapLineCheck(wxCommandEvent& event);
   void OnClear(wxCommandEvent& event);
   void OnLogTimer(wxTimerEvent& WXUNUSED(event));
-  void RemoveAllListeners();
   void UpdateLog();
 };