jQuery UI replaced the buttonset widget with a controlgroup widget. This
adjusts the JavaScript and styling accordingly.

- jQuery to 3.1.1
- jQuery UI to 1.12.1
- jQuery Migrate to 3.0.0

There are a few warnigs from migrate that have to be fixed. The toggles
in the Media Manager are also missing their proper icons.

Uses paragonie/random_compat instead of insecure home-brewed code.

It's NEVER fine to fall back to mt_rand() for secure random.

Fixes #1760.

Translation update (sr)

Translation update (sr)

inSQL password checking for authpdo

fix calculation of LastRevisionAt

added debug prints to better figure out when LDAP has search issues.

Return valid xml when XML-RPC interface not enabled

Implemented interwiki substitution for external images (issue #1614).

Translation update (zh)

Translation update (sr)

Translation update (no)

currently phpseclib throws an error (about a deprecated function).
errors do not count as failures, so we can't skip them. so for now
7.1 testing is removed again.

DE translation for keys: update_name, update_mail

Usermanager/update lang de

DE translation for key 'protected'

Translation update (ro)

Translation update (no)

Translation update (no)

Translation update (no)

Translation update (no)

Translation update (no)