Config regeneration bug fixed, caused by `checkupdate` method

Flag permission fixed

Bugs fixed

• Back button now work in all edit menus

Added

• Usage message now is configurable
• Removed no permission message in homes menu, now only open the edit menu

BUGS FIXED
- NullPointerExpection en edit menu, produced wen item is disabled
- Hide message now it works correctly
- usePermission Option now works with custom items

New Features added:

1. Use permissions option: now you can set a player permission to use gui items
2. Lock option: now flags can lock to changue group option
3. New default flags added: use,build,damage-animals,chest-access,tnt,lighter

Bugs related reopen gui fixed

BUG FIXED

• ban module fixed

NEW ADDED

• now you can add string flags
• now you can add custom items in menus

BUGS FIXED
- Variables and menus now show all members an owners
- Admins now can open the flags menu of other players protection