Feature: #104095 - Edit specific columns of multiple files in Filelist module

Description

Using the "Show columns" action in the File > Filelist backend module allows to select the columns to be displayed file and folder listing.

When selecting multiple files, it has already been possible to edit the metadata of all those records at once, using the "Edit Metadata" button above the listing.

Now, a new button "Edit selected columns" has been introduced, which additionally allows to access the editing form for the selected files with just the columns of the current selection (based on "Show columns"). This improves the usability when doing mass editing of specific columns.

Impact

It's now possible to edit selected columns of multiple file metadata in the File > Filelist backend module, using the new "Edit selected columns" button.