Bug fix.

When search box goes out of focus, it gets empty, but the main
page does not get updated and still shows filtered extensions.
This bug is fixed.
Merge pull request #92 from p-march/fix

Bug fix.
Fixing bugs.

Pressing ESC on the search of behavior overlay clears the search
results, unfocus the search box, and leaves the behavior overlay
opened.

Clicking cancel button on the search box of behavior overlay,
clear the search box and search results on the behavior tab.