Fix [2664479]: handle monster lookups from ?/M better.

Handle mimics better. Note that the monster pane will unify two mimics if you see both at once; I think this is not because of what I just changed but it might be.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@9336 c06c8d41-db1a-0410-9941-cceddc491573

Created by  haranp  on March 5, 2009
B7HNT7TF42G5I5XE65QVUVLAKBGORVDFYVC2WDOJQXGRMQWGI4QAC
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