separate non-native mouse handling from IsUserPane

NSOpenGLView is needed under 10.14 as native view, in order to reuse wx touch and mouse handling we trigger this separately from IsUserPane being true

include/wx/osx/core/private.h

@@ -231,6 +231,10 @@ public :
     // we are doing keyboard handling in wx code, other events might be handled natively
     virtual bool        HasUserKeyHandling() const { return m_wantsUserKey; }
     
+    // we are doing mouse handling in wx code, other events might be handled natively
+    // right now this is always in sync with HasUserKeyHandling
+    virtual bool        HasUserMouseHandling() const { return m_wantsUserKey; }
+
     wxWindowMac*        GetWXPeer() const { return m_wxPeer; }
 
     bool IsOk() const { return GetWXWidget() != NULL; }