Clipboard, Select, Format, Insert groups and rename GEANY_KEYS_*
accordingly.
Group most keybinding callbacks together according to keybinding
group.
Add underscore for GEANY_KEYGROUP_*.
Set main menu widget with keybindings_set_item() - this is still
ignored for now. Popup menu accels are set separately.


git-svn-id: https://geany.svn.sourceforge.net/svnroot/geany/branches/plugin-keybindings@2323 ea778897-0a13-0410-b9d1-a72fbfd435f5