Fix incorrect initial tabs position for vertical tab bars
Summary:
This fixes the incorrect initial positioning of the tabs for vertical
tab bars that persisted until the user switched to another tab
manually.
BUG: 395390
FIXED-IN: 5.62
Reviewers: Plasma, ngraham, hein
Reviewed By: Plasma, ngraham, hein
Subscribers: kde-frameworks-devel
Tags: Frameworks
Maniphest Tasks: T10047
Differential Revision: https://phabricator.kde.org/D23036