Bug 27130: Don't display itemnumber under "File type" section

Bug 27130: Don't display itemnumber under "File type" section

There is no need to have the "File type" section when we attach a cover
item to an item (we cannot upload a zip file)

This patch removes the fieldset abd adds the itemnumebr to the breadcrumbs and headings.
It also adjusts the help text, removing ZIP as an option when uploading for a biblio or item

Lastly it adjusts the results page to use a heading to make things a bit clearer

Test plan:
 1 - Enable 'LocalCoverImages' system preference
 2 - Browse to the details page for a record
 3 - Under the 'Images' tab click 'Upload'
 4 - Note the display includes File type section with a biblionuber input
 5 - Upload an image and note the results page
 6 - Return to the biblio, this time on the 'Holdings' tab
 7 - Click the down arrow next to 'Edit' and choose 'Upload image'
 8 - Note the form has a File type section with an itemnumber input
 9 - Apply patch
10 - Repeat steps 2-9, making sure changes to page make sense
11 - Note the breadcrumbs have been updated
12 - Confirm you can complete the upload of the cover for an item and that results look as expected

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>