linking commands on the individual window level, otherwise built-in handlers override...

linking commands on the individual window level, otherwise built-in handlers override our own (eg Paste is handled internally in a textcontrol without going through our own, resulting in changing 'read-only' unicode textcontrol)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@37306 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775