Call KRunner KRunner
We are currentlly very inconsistent how we refer to KRunner, impairing comprehensibility
among both expert users (who know it as "KRunner") and novice users (for whom "Run
Command" has a literal and somewhat scary meaning).
This patch is a part of T10966: Unify how we refer to KRunner and standardizes on "Show KRunner", helping to turn
KRunner into a user-visible brand name like Apple's Spotlight.
Reviewed By: VDG, ndavis
Subscribers: ndavis, plasma-devel
Maniphest Tasks: T10966
Differential Revision: https://phabricator.kde.org/D21341