Choice of Columns display should have a scrollbar

The choice of columns display window cannot display all choices when large number of columns exists.

How to reproduce:

• boot Nuxeo and research something existing
• in the results screen, hit the parameter wheel on the right hand side enabling choice of columns (9 columns choice by default)
• shrink the window so much that not all columns are displayed in the popup
• observe that no scrollbar appears disabling effectively choice of columns not appearing on the popup => This is a trouble when having a large number of columns not fitting on the screen width

Requesting that a scrollbar exists in the choice of columns popup display