Fix: don't reset Highlight when saving some files
Fix the regression of patch D20959.
In sftp:// or fish:// files, the current syntax highlighting isn't stored in $HOME/.config/katemetainfos.
Therefore, when saving a file, the highlighting is reset.
This only happens when changing the hl from the "Highlighting" menu, not from the "Mode" menu.
Basically, this returns to the state before the patch D20959, but now the highlight will always change if user is true.
Reviewers: KTextEditor, cullmann
Reviewed By: KTextEditor, cullmann
Subscribers: kwrite-devel, kde-frameworks-devel
Differential Revision: https://phabricator.kde.org/D21331