mcedit: Highlighting not cancelled on failed search

[Reynir Stefansson]

When an F7 search in mcedit fails, highlighting isn't cancelled 
immediately. Some may see this as a bug, others as a feature.

Observed in both baseline and 2007-01-04-16.

Reynir H. Stefánsson (reynirhs at mi.is)
-- 
[What got him talking so suddenly?] flip [He's barely spoken in three
months...] flip [and now he's talking to me again?] flip [WHY AM I
THINKING...] flip [OUT LOUD WITH THESE SIGNS?!]

                (Genma, in "Ranma's Morning Confession" by Ringmaster)