Bug 35529: Avoid 'click' in link in library administration

Bug 35529: Avoid 'click' in link in library administration

It's not necessary to label a link with 'click', it being
a link and being formatted as such is enough.

To test:
* Go to administration > libraries
* Edit any library
* Verify link texts for UserCSS and UserJS
  * Click to edit
  * Click to collapse
* Apply patch, restart all
* Verify links have been updated, click removed

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Julian Maurice <julian.maurice@biblibre.com>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>