Added the functionality to add level groups.
-30, 30+, 50+, 75+, 100+, 150+, 200+, 250+, 300+, 500+
If filled out in the backend will add corresponding level/group to user.
Since this does not have to be filled out, it is "backwards compatible".
- Added RIOT Levels
- Optimized removeServerGroup() function
- Added promise chain, to prevent functions from possibly executing at the same time when
!lolreload all
is executed