[Build Addon] Force LTR direction on the treeWidget for RTL locales
Summary:
In RTL locales, the tree widget (showing target set and errors) is mirrored and
unusable, this should force it’s direction to be LTR.
Reviewers: Kate, KTextEditor, sars
Reviewed By: sars
Tags: Kate
Differential Revision: https://phabricator.kde.org/D10003