Fix incorrect Kickoff tab bar layout for vertical panels
Summary:
This fixes the broken layout of the tab bar (tab bar takes the whole view)
when a panel is changed from horizontal to vertical that persists
until plasmashell is restarted.
BUG: 393888
Test Plan:
Change panel orientation from horizontal to vertical. Open Kickoff.
Before fix: tab bar fills the whole view making the Kickoff unusable even if you make the panel horizontal again.
After fix: tab bar has the correct size.
Reviewers: Plasma, hein, ngraham
Reviewed By: ngraham
Subscribers: plasma-devel
Tags: Plasma
Maniphest Tasks: T10047
Differential Revision: https://phabricator.kde.org/D22988