Partially unrevert 05e82c24 for macOS which still needs it

app/streaming/input/input.h

@@ -69,6 +69,8 @@ public:
 
     void raiseAllKeys();
 
+    void notifyFocusGained();
+
     void notifyFocusLost();
 
     bool isCaptureActive();
@@ -125,6 +127,8 @@ private:
     bool m_AbsoluteMouseMode;
     bool m_AbsoluteTouchMode;
 
+    bool m_PendingFocusGain;
+
     SDL_TouchFingerEvent m_TouchDownEvent[MAX_FINGERS];
     SDL_TimerID m_LeftButtonReleaseTimer;
     SDL_TimerID m_RightButtonReleaseTimer;