Bug 25702: Actions button on Search results from Z39.50 is displayed incorrectly

Bug 25702: Actions button on Search results from Z39.50 is displayed incorrectly

This patch modifies, again, the way the actions popup is implemented in
Z39.50 search results, whether it be in cataloging, authorities, or
acquisitions. The solution for Bug 25282 changed some markup which was
being referred to in JavaScript. This patch makes the markup more
consistent and unifies handling of the menu in one JavaScript file.

The solution changes the way a menu is generated when the user clicks
within the row of Z39.50 search results (not on the "Actions" button).
The script now creates a clone of the actions menu in that row and
appends it to the <td> the user clicked on.

To test, apply the patch and clear your browser cache if necessary. Test
these three areas in the same way:

1. Cataloging -> New from Z39.50 -> Search
2. Authorities -> New from Z39.50 -> Search
3. Acquisitions -> Vendor -> Add to Basket -> From an external source ->
Search.

In each case, test the functionality of the "Actions" menu button in the
last column ("Preview" in Acquisitions search results). The menu
should be positioned correctly and menu choice works correctly

Click anywhere else in the search results table. The same actions menu
should be triggered in that table cell. Confirm that these menu items
work correctly according to the row which was clicked.

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>
(cherry picked from commit 84230fcd798805c38c9ff16312121011cd0dc782)