Use ellipsis in search field

Summary: Screenshot: {F6691966}

Test Plan: Build, run and search field work as before

Reviewers: #kalzium, #vdg, yurchor

Reviewed By: yurchor

Subscribers: aacid, yurchor, ngraham, kde-edu

Tags: #kde_edu

Maniphest Tasks: T10258

Differential Revision: https://phabricator.kde.org/D19774