Bug 32355: Add css class url to URL syspref

Add missing css class to URL syspref.

To Test:
1 - open admin/preferences.pl
2 - Search for URL
3 - casServerUrl, UsageStatsLibraryUrl, KohaManualBaseURL,
    PrivacyPolicyURL, LibrisURL input field size are small.
4 - Apply patch
5 - all URL fields have the same bigger size.

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
(cherry picked from commit af794a6cfa)
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>

koha-tmpl/intranet-tmpl/prog/en/modules/admin/preferences/admin.pref

@@ -156,6 +156,7 @@ Administration:
         -
             - "URL of the Central Authentication Service (CAS) server: "
             - pref: casServerUrl
+              class: url
         -
             - "Version of the CAS server Koha will connect to: "
             - pref: casServerVersion
@@ -431,6 +432,7 @@ Administration:
         -
             - "The library URL to be shown on the Hea Community website: "
             - pref: UsageStatsLibraryUrl
+              class: url
             - <br><strong>NOTE:</strong> This value has no effect if the <a href="/cgi-bin/koha/admin/preferences.pl?op=search&searchfield=UsageStats">UsageStats</a> system preference is set to "No" (don't share).
         -
             - "The library type to be shown on the Hea Community website: "

koha-tmpl/intranet-tmpl/prog/en/modules/admin/preferences/enhanced_content.pref

@@ -418,6 +418,7 @@ Enhanced content:
         -
             - Location of the Koha manual
             - pref: KohaManualBaseURL
+              class: url
             - You can specify the location of the Koha manual to use. By default it is https://koha-community.org/manual/
             - If starts with '/',  the value of <a href="/cgi-bin/koha/admin/preferences.pl?op=search&searchfield=staffClientBaseURL">staffClientBaseURL</a> will be used as a prefix.
             - Note that it will be suffixed by the version / the language / the format (/17.11/en/html)

koha-tmpl/intranet-tmpl/prog/en/modules/admin/preferences/patrons.pref

@@ -352,6 +352,7 @@ Patrons:
      -
          - Use the following URL
          - pref: PrivacyPolicyURL
+           class: url
          - to refer to your local privacy policy in messages about privacy and data protection. (If you enforce GDPR policy, make sure that this page is not blocked.)
          - '<br><strong>NOTE:</strong> The URL will only be displayed if <a href="/cgi-bin/koha/admin/preferences.pl?op=search&searchfield=GDPR_Policy">GDPR_Policy</a> is set.'
      -

koha-tmpl/intranet-tmpl/prog/en/modules/admin/preferences/searching.pref

@@ -324,4 +324,5 @@ Searching:
         -
             - LIBRIS base URL
             - pref: LibrisURL
+              class: url
             - "Please only change this if you are sure it needs changing."