todo, make a setting to let the admin chose which name wants to  use here

Signed-off-by: Suki <suki@missallsunday.com>
How many posts are required to appear on the mention list?

Signed-off-by: Suki <suki@missallsunday.com>
A nice title for every settings page
This shouldn't be done on this particular branch but meh...

Signed-off-by: Suki <suki@missallsunday.com>
Cache the possible huge mention array list

Signed-off-by: Suki <suki@missallsunday.com>
Use the "admin_posts_for_mention" setting
and also set a warning about the 3 hours cache entry

Signed-off-by: Suki <suki@missallsunday.com>
Add another per user setting for displaying users when metioning

Signed-off-by: Suki <suki@missallsunday.com>