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/WxUtils.cpp

@@ -66,13 +66,6 @@ void ShowErrorDialog(const wxString& error_msg)
   wxMessageBox(error_msg, _("Error"), wxOK | wxICON_ERROR);
 }
 
-wxBitmap LoadResourceBitmap(const std::string& name, const wxSize& padded_size)
-{
-  wxWindow* context = wxTheApp->GetTopWindow();
-  return LoadScaledResourceBitmap(name, context, padded_size, wxDefaultSize,
-                                  LSI_SCALE_DOWN | LSI_ALIGN_VCENTER, *wxWHITE);
-}
-
 wxBitmap CreateDisabledButtonBitmap(const wxBitmap& original)
 {
   wxImage image = original.ConvertToImage();