Column "Title" can be de-selected in the colums-selection (this should not be possible) - 5.0.0.

[samuelinniger]

Describe the bug
The column "title" can be selected and de-selected in the Colums selection. This should not be possible.
In previous plugin-versions (e.g. 3.7.5), the columnt "title" would not show up in the column selection.

To Reproduce
Steps to reproduce the behavior:

1. Go to the content page of an Opencast Series in ILIAS
2. Click on "Columns"

Expected behavior
The column "title" can not be selected / de-selected in the Column-Selection.

Screenshots

Log
If you have it please attach the relevant log.

Environment (please complete the following information):

ILIAS version: v7.11 2022-06-29
Plugin version: 5.0.0
Browser: Firefox
Opencast 11.0.0.

Additional context
This expected behavior (columnt "title" can not be selected/deselected) was introduced some years ago - it fixed a bug or an unexpected behaviour, if I remember well. There should be a commit for it somewhere.