bank_alliance.php: make reason textarea shorter
bank_alliance.php: make reason textarea shorter

Change height of "reason" textarea from 15em to 5em. This is still
probably too large, but it's quite absurd right now considering that
not many people provide a reason at all.

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