To prevent wxPropertyGrid from stealing frocus from other controls, only let SetFocusOnCanvas() move focus to the main grid 'canvas' if focus was already in on the grid's child controls

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@67142 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/propgrid/propgrid.h

@@ -2238,6 +2238,8 @@ protected:
                     unsigned int selFlags = wxPG_SEL_NOVALIDATE,
                     unsigned int column = 1 );
 
+    // This function only moves focus to the wxPropertyGrid if it already
+    // was on one of its child controls.
     void SetFocusOnCanvas();
 
     bool DoHideProperty( wxPGProperty* p, bool hide, int flags );