Add template check in project and widget verify functions.
This will warn a user if he is trying to create a template class that targets
a gtk version that does not support it.
TODO: Added unsuported object classes list
Added GtkLockButton support.

@aaa
Added missing GladeWidgetAdaptor:catalog accessor
Added missing displayable values for AtkObject::accessible-role
GladeWindow: only show found recent files.