D16913: Add the possibility to give focus to the KPluginSelector search field

[Nathaniel Graham]

ngraham added a reviewer: Plasma.

REPOSITORY
  R295 KCMUtils

REVISION DETAIL
  https://phabricator.kde.org/D16913

To: thsurrel, #frameworks, #plasma
Cc: davidedmundson, cfeck, broulik, ngraham, kde-frameworks-devel, michaelh, 
bruns