bounty_view.php: use number_format and fix spacing
bounty_view.php: use number_format and fix spacing

The bounty amounts are now number-formatted, and the visual spacing
between bounties has been improved.

smrealms/smr,smrealms/smr,hemberger/smr,hemberger/smr,smrealms/smr,hemberger/smr,hemberger/smr