D10272: Fix crash when searching

[Albert Astals Cid]

aacid created this revision.
Restricted Application added a project: Plasma.
Restricted Application added a subscriber: plasma-devel.
aacid requested review of this revision.

TEST PLAN
  Put the mouse over the left bar to get a tooltip, then type gibbership and remove it a few times, get it to crash

REPOSITORY
  R124 System Settings

BRANCH
  Plasma/5.12

REVISION DETAIL
  https://phabricator.kde.org/D10272

AFFECTED FILES
  sidebar/ToolTips/tooltipmanager.cpp

To: aacid
Cc: plasma-devel, ZrenBot, progwolff, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, mart
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