Bug 35449: Accessibility: No links on "here"

Bug 35449: Accessibility: No links on "here"

This patch updates two system preferences, "OPACUserJS" and
"OPACUserCSS" so that the "here" links in the description instead read
"library administration".

To test, apply the patch and go to Administration -> System preferences.

- Search for "opacuser"
- The descriptions of the "OPACUserJS" and "OPACUserCSS" preferences
  should include the phrase "...can be defined in library
  administration," with "library administration" leading to the correct
  page.

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Victor Grousset/tuxayo <victor@tuxayo.net>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>