FullscreenUI: Fix change disc hotkey again

src/core/fullscreenui.cpp

@@ -897,6 +897,9 @@ void FullscreenUI::StartChangeDiscFromFile(bool return_to_game)
 
   OpenFileSelector(FSUI_ICONVSTR(ICON_FA_COMPACT_DISC, "Select Disc Image"), false, std::move(callback),
                    GetDiscImageFilters(), std::string(Path::GetDirectory(VideoThread::GetGamePath())));
+
+  // This can come from the core thread without the menu, so need to to trigger run idle.
+  UpdateRunIdleState();
 }
 
 void FullscreenUI::BeginChangeDiscOnCoreThread(bool return_to_game)
@@ -996,9 +999,7 @@ void FullscreenUI::BeginChangeDiscOnCoreThread(bool return_to_game)
     }
   }
 
-  VideoThread::RunOnThread([return_to_game]() {
-    StartChangeDiscFromFile(return_to_game);
-  });
+  VideoThread::RunOnThread([return_to_game]() { StartChangeDiscFromFile(return_to_game); });
 }
 
 void FullscreenUI::DoToggleAnalogMode()