Bug 7442: fix crash when selecting an authority with 200$x or 200$y (UNIMARC)

From a biblio record, if one wants to add a 600$a information, a pop-up
appears.  On this new window, on search terms typed and validated, a table
result is displayed, with a column "Get It!" allowing the selection of an
authority.  From here, different cases:

1) If we have a simple authority with 200$a and 200$b subfields, a link
   "choose" is displayed, working correctly.

2) If the authority has different occurences of 200$a/200$b, numeric links (1 2
   and so on) are displayed, one for each occurence.  In the example of my
   screenshot, the line with a "Paul, Korky -- Pauline, Korkette" summary
   possesses two links : "1" will add "Paul, Korky" whereas "2" will add
   "Pauline, Korkette" (couldn't come up with a better name ;)).

3) If the authority has 200$x or 200$y subfields defined, several links are
   also created, when it should not be the case.  In our example, "Niclausse,
   Paul -- Expositions" will create a link "1" for "Niclausse, Paul" and a link
   "2" for "Expositions".  Clicking on the 2nd link leads to the following
   error: Software error: Can't call method "subfields" on an undefined value
   at
   /home/asaurat/workspace/versions/community/authorities/blinddetail-biblio-search.pl
   line 86.  Only the cases 1 and 2 should be handled. The creation of links
   for subfields like 200$x or 200$y should be removed.

This problem is caused by the use of " -- " has separator of authorities with
several headings, but also in some heading between main part and subdivisions.
This patch corrects this by using an array in authorities summary so that
presentation is computed in template. I've choosen to use the pipe separator
between authorities with several headings. This may be changed to be
configurable.

Test plan :

- Edit an authority type summary : for example subject (heading on 250) :
  summary "[250a][ -- 250x]"
- Create an authority A1 with one heading and a subdivision : for example a
  subject : 250$a "History" 250$x "20th century"
- Create an authority A2 with several headings. for example a subject : 250$a
  "History" 250$a "Legends"
- Rebuild Zebra queue
- Go to OPAC and click on "Authority search" and search on "History"
  => You will find A1 and A2 :
    History -- 20th century
    History | Legends
- Go to intranet autorities search and search on "History"
  => You will find A1 and A2 :
    History -- 20th century
    History | Legends
- Edit a record using this autorities type as thesaurus : for example on 606$a
- Click on thesaurus link and search on "History"
  => You will find A1 and A2 :
    History -- 20th century ; 0 times ; choose ; Edit authority
    History | Legends       ; 0 times ; 1 2    ; Edit authority
- Click on link "2" to chosse "Legends"
  => You get "Legends" in heading field : for example 606$a

Signed-off-by: Frédéric Demians <f.demians@tamil.fr>

I can confirm the problem and the solution. I have tested the patch on a large
DB with authorities having multiples headings. There is no regression on bug
4838.

Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Passes all tests and QA script.
Without the patch I couldn't choose between multiple headings
in the authority plugin, but with the patch it works as described.

Signed-off-by: Galen Charlton <gmc@esilibrary.com>
Bug 7442 (follow-up) ensuring that summary is display when searching on all types of authorities

This patch corrects a small bug :

Authorities search on all types does not show summary because it is computed
with selected type (which is empty) instead of using found authority type.

Test plan :
- Go to intranet autorities search
- Perform a search on all authorities types
- Look at results
  => Without this patch, results rows do not display the autority summary, only
     authorized headings

Signed-off-by: Frédéric Demians <f.demians@tamil.fr>
Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>
Bug 7442: (follow-up) restore display of heading type for non-UNIMARC

This patch restores the display of the authority type summary for
MARC21, where at present the heading type (i.e., "Topical Term",
"Personal Names") come over for display in the template.

Signed-off-by: Galen Charlton <gmc@esilibrary.com>
Bug 7442: (follow-up) apply change to Bootstrap theme

Signed-off-by: Galen Charlton <gmc@esilibrary.com>