Columns field broken on issues page

[tommarshall]

The 'Columns' field under the 'Options' group on the issues page does not work when the redmine__select2 plugin is present.

The arrow buttons for moving and ordering the columns between the 'Available Columns' & 'Selected Columns' multi select fields are present, but do not have any affect when clicked.

I expect this is because Redmine is applying it's own JavaScript behaviour in order for the component to function.