Bug 16366 - Remove obsolete "border" attribute from <img> tags

Bug 16366 - Remove obsolete "border" attribute from <img> tags

This patch removes the obsolete "border" attribute from <img> tags.
Browsers haven't applied an border to images by default for years.

There should be no visible changes as a result of this patch. It only
affects HTML validation. If you want to test the affected pages, apply
the patch and confirm that images look correct on these pages:

- In the patron sidebar menu, if patron images are enabled.
- On the authority MARC subfield structure administration page, only
  some obsolete markup is affected (See Bug 16367).
- I don't know how to trigger display of the "filefind.png" image on
  authority and bibliographic detail pages. Possibly unused markup?
- On the advanced search page, itemtype/collection/shelving location
  images should look correct.
- When viewing existing holds for a title, the arrow images used for
  changing the position of a hold in the list should look correct.
- When viewing a list of MARC modification actions, the arrow images
  used for changing the order of actions should look correct.

Signed-off-by: Marc Véron <veron@veron.ch>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>