Qt: Implement Show Platforms / Show Regions

Porting the View config logic from WX to Qt.
Adds to the View Menu

Source/Core/DolphinQt2/CMakeLists.txt

@@ -63,6 +63,7 @@ set(SRCS
   GameList/GameListModel.cpp
   GameList/GameTracker.cpp
   GameList/ListProxyModel.cpp
+  GameList/TableProxyModel.cpp
   QtUtils/DoubleClickEventFilter.cpp
   QtUtils/ElidedButton.cpp
   QtUtils/WindowActivationEventFilter.cpp