Initial ShowWithoutActivating implementations for Mac and Windows, and attempt to improve IsActive behavior on Mac. Also adding ShowWithoutActivating() and Show/Hide tests, but until the mainloop issues are resolved, not adding them to tests.bkl.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@62508 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/osx/core/private.h

@@ -717,6 +717,8 @@ public :
 
     virtual bool IsFullScreen() const= 0;
 
+    virtual void ShowWithoutActivating() { Show(true); }
+    
     virtual bool ShowFullScreen(bool show, long style)= 0;
 
     virtual void RequestUserAttention(int flags) = 0;
@@ -725,6 +727,8 @@ public :
 
     virtual void WindowToScreen( int *x, int *y ) = 0;
 
+    virtual bool IsActive() = 0;
+    
     wxNonOwnedWindow*   GetWXPeer() { return m_wxPeer; }
 
     // static creation methods, must be implemented by all toolkits