Bug 19954: Update popup window templates to use Bootstrap grid: Patrons

Bug 19954: Update popup window templates to use Bootstrap grid: Patrons

This patch updates two patron-related templates to use the
Bootstrap grid instead of the YUI grid.

This patch also corrects an unrelated error in update-child.tt where
some JS variable declarations required by members-menu.js were
missing.

To test you must have more than one adult-type patron category defined.

- Locate and view a child-type patron record.
- From the "More" menu in the toolbar, choose "Update child to adult
  patron."
  - The popup window which appears should look correct and work
    correctly.
  - The table of patron categories should be sortable.
- Add a new patron and enter the first and last names of an existing
  patron.
  - When Koha asks to confirm a possible duplicate record, click the
    "View existing record" link. The popup which is triggered should
    look correct.

Signed-off-by: Zoe Bennett <zoebennett1308@gmail.com>
Signed-off-by: Claire Gravely <claire.gravely@bsz-bw.de>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>