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/Globals.h

@@ -163,7 +163,9 @@ enum
   IDM_CONFIG_LOGGER,
 
   // Views
-  IDM_LOG_WINDOW,
+  // IMPORTANT: Make sure IDM_FLOAT_xxx and IDM_xxx_PARENT are kept in sync!
+  IDM_DEBUG_WINDOW_LIST_START,  // Bookend for doing array lookups
+  IDM_LOG_WINDOW = IDM_DEBUG_WINDOW_LIST_START,
   IDM_LOG_CONFIG_WINDOW,
   IDM_REGISTER_WINDOW,
   IDM_WATCH_WINDOW,
@@ -173,9 +175,10 @@ enum
   IDM_SOUND_WINDOW,
   IDM_VIDEO_WINDOW,
   IDM_CODE_WINDOW,
+  IDM_DEBUG_WINDOW_LIST_END,  // Bookend for doing array lookups
 
   // List Column Title Toggles
-  IDM_SHOW_SYSTEM,
+  IDM_SHOW_SYSTEM = IDM_DEBUG_WINDOW_LIST_END,
   IDM_SHOW_BANNER,
   IDM_SHOW_MAKER,
   IDM_SHOW_FILENAME,
@@ -345,6 +348,7 @@ enum
 // custom message macro
 #define EVT_HOST_COMMAND(id, fn) EVT_COMMAND(id, wxEVT_HOST_COMMAND, fn)
 
+// FIXME: This should be changed to wxThreadEvent
 wxDECLARE_EVENT(wxEVT_HOST_COMMAND, wxCommandEvent);
 
 // Sent to wxTheApp