Bug 23606: Add columns configuration and export options to item types administration

Bug 23606: Add columns configuration and export options to item types administration

This patch adds column configuration to the table of item types
in administration. No new defaults for the table are defined.

To test, apply the patch and clear your browser cache if necessary.

 - Go to Administration -> Item types.
   - Test that the "Column visibility" button works to show and hide
     columns. The "actions" column should be excluded.
   - Test that export options (Excel, CSV, etc) exclude the "actions"
     column.
 - Go to Administration -> Columns settings and edit the default
   configuration of the item types table. Confirm that these
   changes are reflected in item tyeps administration.

Test with noItemTypeImages on and off.

Signed-off-by: Maryse Simard <maryse.simard@inlibro.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>