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/cocoa/private.h

@@ -233,6 +233,8 @@ public :
     virtual bool IsFullScreen() const;
 
     virtual bool ShowFullScreen(bool show, long style);
+    
+    virtual void ShowWithoutActivating();
 
     virtual void RequestUserAttention(int flags);
 
@@ -240,6 +242,8 @@ public :
 
     virtual void WindowToScreen( int *x, int *y );
 
+    virtual bool IsActive();
+    
     wxNonOwnedWindow*   GetWXPeer() { return m_wxPeer; }
 protected :
     WX_wxNSWindow         m_macWindow;