separate enum set, which will make the plugin ABI more stable,
and lay the groundwork for plugin keybindings support.
Note: this breaks the plugin API.
Disable setting menu accelerators (temporary).
Disable Keyboard Shortcuts dialog (temporary).
Disable snippets completion (temporary).
Disable focus commands in the VTE (temporary).
Make Tags group use separate cb_func_tags callback.
Rename keybindings_cmd() to keybindings_send_command().
Add keybindings_lookup_item().


git-svn-id: https://geany.svn.sourceforge.net/svnroot/geany/branches/plugin-keybindings@2297 ea778897-0a13-0410-b9d1-a72fbfd435f5