Bug 28177: Add date column and column configuration to uploads

Bug 28177: Add date column and column configuration to uploads

This patch adds a "Date added" column to the table showing uploaded
files. Column configuration is added to the table, and the date column
is hidden by default.

To test, apply the patch and restart all.

- Go to Tools -> Upload.
- If necessary, upload multiple files with the same category.
- Use the "Search uploads by category" form to find those uploads.
- In the table of uploads, confirm that table settings and other
  DataTable controls work correctly, including the option to show the
  "Date added" column.
- Go to Administration -> Table settings -> Tools -> upload.
- Change the settings for the uploads table.
- Return to Uploads and confirm that your changes are reflected in the
  display of the uploads table.

Signed-off-by: Salman Ali <salman.ali@inLibro.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>