Fix game requirement duplciation

If requirements were selected, but the deadline was in the past, it would keep adding those requirements to the list each time it was clicked but not created. I added a hotfix which clears the list each time create game is clicked before re-adding the requiremets (adding was already there, I just cleared it before that adding happened, thus stopping duplication
Fix issue with certain buttons being enabled for a non-moderator when they shouldn't be
Merge pull request #325 from sfmailand/sbl-dev

Moderator buttons