(INTERNAL) Remove tkTable

I was surprised to see that tkTable wasn't used in sn, it must
have been there for Insight, like iwidgets used to be.
(BUGFIX) Fix invoking the "Revision Control Editor" dialog

I doubt anyone still uses this, but at least the dialog should
pop up.
(BUGFIX) Updated the copyright notice to 2007-2014
Merge branch '8.4' into Ttk
(BUGFIX) Fix invoking the "Revision Control Editor" dialog

I really should know better than to use -bd 2 with a ttk::frame