Bug 32519: In Elasticsearch mappings table use of search field name and label

Bug 32519: In Elasticsearch mappings table use of search field name and label

In Elasticsearch mappings table, in tabs for mappings we should add search field name in addition to label ; in order to find them when searching using DataTable search field. This is very useful when debugging.

Also the lines are sorting alphabetically by search field name.
So I propose to display name and label between parenthesis.
And also add label to the form in last line.

By default label equals name so I display label only if different from name.

Test plan :
1) Go to : Administration > Search engine configuration (Elasticsearch)
2) In first tabe edit a line to change label, for example : author => Auteur
3) Save
4) Go to second tab
5) Check you see a line with 'author (Auteur)' and lines with only name when label equals name
6) Look at last line (addition form)
7) Check you see in combobox : 'author (Auteur)' and lines with only name when label equals name

Signed-off-by: Solene Ngamga <solene.ngamga@inLibro.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
(cherry picked from commit 14a2cc60a404709edc97f6daed8ad8e00dd884e8)
Signed-off-by: Matt Blenkinsop <matt.blenkinsop@ptfs-europe.com>