Bug 29616: Replace library information popup in the OPAC with a modal

Bug 29616: Replace library information popup in the OPAC with a modal

This patch modifies the OPAC bibliographic detail page so that
information stored in libraries' "OPAC info" field can be displayed in a
modal window instead of in a tooltip. This will make it more readable,
especially for libraries with so much info content that the popup can
disappear off the bottom of the page.

To test, apply the patch and make sure you have at least one library
configured according to each of these:

A. One with both branches.branchurl and branches.opac_info
B. One with branches.branchurl but not branches.opac_info
C. One with branches.opac_info but not branches.branchurl
D. One with neither branches.branchurl nor branches.opac_info

View the bibliographic detail page in the OPAC for title(s) which have
holdings from the libraries you configured above. In the holdings table,
check the behavior of the library name in the "Current library" or "Home
library" columns *

- Case A: The library name appears as a link with an "info" icon.
  Clicking it shows the library information in a modal window. In the
  modal footer, a "Visit web site" button should take you to the correct
  URL.
- Case B: The library name appears as a link without an icon. Clicking
  the link takes you to the correct URL.
- Case C: The library name appears as a link with an "info" icon.
  Clicking it shows the library information in a modal window. In the
  modal footer there is no "Visit web site" button.
- Case D: The library name is plain text.

* Display of "Current library" and/or "Home library" is controlled by
  the OpacLocationBranchToDisplay system preference.

Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>
Signed-off-by: The Minh Luong <the-minh.luong@inlibro.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>