* sets a minimal default memory if unset
* defaults to localhost if node full
* test fill memory

issue #1297

* feature(backend): auto shutdown disconnected
* feature(frontend): do not fetch data if not changed

issue #1276 

fix(KVM): unique MAC in all network cards

alwo test(KVM): check for duplicated MACs in 2nd eth

fixes issue #1294

The check grants on frontend was slow because it opened
the virtual machine properties. A SQL check is enough

issue #1271

* fix(backend): check volume name isn't already used

issue #1285

feat(settings): Shutdown all clones from settings

Issue #1287

Also force date_changed from table requests preventing
future conflicts

issue #1271

issue #1271

issue #1271

fix(dockers): Update path files and .env

Issue #1270

* feature(backend): auto shutdown disconnected

issue #1280

When a domain has started in a remote node it already
has its volume there, make it reuse it.

issue #1274

- Removed order by other fields
- Also tweaked ping backed so it is more accurate

issue #1276

The new set time request made some test fail because
it wasn't expected before.

issue #1279

issue #1279

Check for usernames with spaces are scaped now

issue #1277

When a domain has started in a remote node it already
has its volume there, make it reuse it.

issue #1274

https://help.github.com/en/github/building-a-strong-community/manually-creating-a-single-issue-template-for-your-repository#adding-an-issue-template

fix(backend): try another node when missing files or crashed start

* Also request to re-prepare failed base
* make sure no duplicate set base
* refactor(frontend): set base status soon so users get their feedback. Reported by @gloriarodriguez
* refactor(frontend): Allow unset base with clones requested by @gloriarodriguez
* fix(backend): add indexes and cleanup db
* refactor(backend): properly start temporary domains

closes issue #1264