Tweaks to roster/rewards screen

The roster/rewards screen is in need of some love.
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Problem: Selling covers that are close to expiring becomes quite tedious when your rewards list is long. After each sale, the list reloads and you have to scroll down to the bottom in order to sell another cover that may be close to expiration.
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Solution: Allow players to sell multiple covers at a time, or prevent rewards list from reloading or scrolling back too top when a cover is sold.