Improve documentation of Document::setPageTextSelection()
Summary:
Improve the documentation of Document::setPageTextSelection()
and PagePrivate::setTextSelections(). Also mention which argument
will be deleted.
Test Plan: Check doxygen output
Reviewers: Okular, aacid
Reviewed By: Okular, aacid
Subscribers: okular-devel
Tags: Okular
Differential Revision: https://phabricator.kde.org/D21069