Can now conditionalize settings based on menu_colour_prefix_class and

menu_colour_prefix_id being set. Used this to make it so that if both are set that identified ego items are colored light blue, not just runed/glowing/etc non-identified items.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@5398 c06c8d41-db1a-0410-9941-cceddc491573

Created by  zelgadis  on June 1, 2008
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