[Gitk PATCH 0/6] Menu accelerators for Gitk

I finally got tired of pressing Alt and some letter to activate menus in Gitk. 
For example in "any" program you can press Alt-F to have the File menu drop 
down and then select the underscored character to select the wanted menu.

This series makes it possible. Friends of TCL may think my solution is too
hack-ish. It doesn't fix all warts but that is the subject of later patches
as it looks like it requires other patches.

Git gui has the same problem, but again, subject to another series.

-- robin