redesign upgrade modal
update FAQ general tab
finish new upgrade feature with monthly and annual subscription possibilities
update tests for new upgrade process
changed reward partial to have links to upgrading or faq
update bid step with different text for premium users
update text on confirm step to account of premium users
add premium column to bids table
add premium column to admin panel for bids
mark bids as premium if bid on by premium user
update reward partial for if reward maxed out
make upgrade button more prominent and remove from user account dropdown