Add new perl lib to Dockerfile

Issue #369

- fit long buttons
- set language only if defined

When in production we return a quick listing first, then
the full list. In the test we need the real thing right away.

* Added arabic lenguage

* Wip: more arabic worlds.

* Added more words to the dictionary, we have 40%

* I have finished translating into Arabic.

there are words i could'nt find the same meaning, so, i had translate to
similar words.

* Arabic translate, i have introduce my name.

required for connect to older LDAP servers

* Do not run all the rebase test unless required

* Add the valencia language
* Fix two typos in spanish

feature(KVM): change number of virtual CPUs

* change CPUs and memory
* refactor(test): change memory via hardware
* refactor(frontend): more responsive machine settings

refactor(backend): spinoff volumes

Base in frontend actions slightly improved. Need some work though

issue #852

Added Kali 2020 to the default ISO list

Properly reads the png blob

fix(renewMac): Renew MAC on more than 1 NIC

closes issue #1201

This problem raised when creating multiple clones
and starting them all at once.

* fix(frontend): copy screenshot updated to db

necessary because of @eskumon changes

closes issue #1221

Instead of searching for machines in nodes we keep
track of instances so it is faster to remove them.

issue #1235