+ calendar: the Who's Online page was missing the Calendar string. It required an extra hook, and I also moved the string to new files to avoid loading unneeded stuff. Or maybe it's always loaded anyway, I don't know... I won't really bother. (plugin-info.xml, lang/Calendar, lang/CalendarWho)

Signed-off-by: Nao <nao@wedge>
! Fixed admin search for 3 plugins: Birthday, Calendar and WedgeDesk. (birthday/Birthday-Admin.php, calendar/ManageCalendar.php, wedgedesk/src/Subs-WedgeDeskAdmin.php)

Signed-off-by: Nao <nao@wedge>