491703: Editor discovery should happen in a non-blocking way

Don't select all results for installation. Users will usually want to
decide among alternatives and only install one. 

Since the "Install" button immediately advances the wizard, this won't 
increase the amount of clicks for a single search result.

Bug: 491703
Task-Url: https://bugs.eclipse.org/bugs/show_bug.cgi?id=491703
1 file changed