Fixes #16743.  If a search is already in progress, stop SPACE on keydown and process in keypress. 
Fixes #16743.  If a search is already in progress, stop SPACE on keydown and process in keypress. 

git-svn-id: 674a2d6b1e32e53f607eb824547723f32280967e@30751 560b804f-0ae3-0310-86f3-f6aa0a117693

harbalk/delite,harbalk/delite,kitsonk/delite,kitsonk/delite,Sam-Cummins/delite,Sam-Cummins/delite