Fix 2784872: Take off not working for wearing (with the option).

Also, add another item selector for worn armour for the takeoff prompt (and equip_unequip is false). I figured in the 'W'ear menu armour already worn takes up less space, and you're rather likely to directly switch to another piece of clothing.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@9719 c06c8d41-db1a-0410-9941-cceddc491573

Created by  j-p-e-g  on May 2, 2009
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