Prometheus - Donation and payment store

Changelog web

1. Yet another fix to the donation goal. Now actually starts from the set date and selects one month back in time, instead of just start of last month till set date
2. Coupon code can now be 100% successfully
3. Coupon code now has a max use of the set number instead of one less
4. Fixed a visual bug where the store tab was highlighted when the user is in their profile area