wxBitmapButton added (doesn't work yet)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/wxUNIVERSAL@8190 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/button.h

@@ -30,6 +30,9 @@ public:
     // show the image in the button in addition to the label
     virtual void SetImageLabel(const wxBitmap& bitmap) { }
 
+    // set the margins around the image
+    virtual void SetImageMargins(wxCoord x, wxCoord y) { }
+
     // this wxButton method is called when the button becomes the default one
     // on its panel
     virtual void SetDefault() { }