[Clipboard] Use ellipsis in the search field label ('Search...' instead of 'Search')
Summary: This patch adds the ellipsis (...) to the search field label in Clipboard so as to make it consistent with the labels in Kickoff, Kicker and KRunner.
Test Plan:
Before:
After:
Reviewers: ngraham, Plasma, VDG
Reviewed By: ngraham, VDG
Subscribers: abetts, filipf, plasma-devel
Tags: Plasma
Maniphest Tasks: T10258
Differential Revision: https://phabricator.kde.org/D17935