Remove reduntant content from XRC format docs.

Window styles are documented globally, no need for control-specific
content for wxStatusBar.  Also, it was outdated and incorrect.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74747 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Add missing XRC format docs for wxComboCtrl and wxEditableListBox.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74748 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775