From the one of the last updates 3-6 months, the most of the icon maps and flags disappear. You before can set units icons in map, and others thins, and flag, but now, all of this dissapeared.
And in the editor, no all the flags appear, some flags disappeared from the list of flags.
I waiting BIS fix this for months, but i not see any change.

Thread on the BIS forums.
http://forums.bistudio.com/showthread.php?184195-From-some-last-patches-icons-and-flags-dissapeared