Bug 34936: Remove the use of event attributes from OPAC detail page

Bug 34936: Remove the use of event attributes from OPAC detail page

This patch removes the use of event attributes (onclick) from the OPAC's
bibliographic detail page template. These events are defined now along
with the other in-page JS.

The patch also adjusts the global "Dopop" function so that the popup
window is a litte bigger. The comments form did not fit well.

In checking for use of the "Dopop" function I found that it was being
redefined in opac-topissues.tt for no reason so I removed it.

To test you must have the OPACComments system preference enabled.

- Log in to the OPAC, locate a bibliographic record, and view the detail
  page.
- Under the "Comments" tab, click the "Post your comments on this title"
  link. It should trigger a popup window.
  - Submit your comment. When the detail page reloads, return to the
    "Comments" tab and click the "Edit" link on your comment. The same
    popup window should be triggered.

Signed-off-by: Victor Grousset/tuxayo <victor@tuxayo.net>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
(cherry picked from commit f03cf6cc108022a05d036d4c197760203d31468b)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>