feature: add (missing) areabrick overview in admin backend

[mike4git]

In Pimcore 11 the default areabrick overview has been removed so there is no OOTB possibility to see all areabricks in an overview in Pimcore Admin Backend.

This PR tries to fill the gap.

Closes #23

[jdreesen]

There's still a bunch of comments that GitHub is hiding because there were so many 🙈 Can you take a look please?

About Pimcore 10 compatibility: I will take a look at this next week in my current project and make this PR compatible. So you can skip this.

[mike4git]

The possibility to add just two more populators to the brick converter has been skipped after your changes:

The way before:

neusta_converter:
  converter:
    pimcore_areabrick_config.brick.converter:
      populators:
        - neusta_trinity_pimcore.brick.tags.populator
        - neusta_trinity_pimcore.brick.groups.populator

leads now to an error:

But the following configuration is running:

neusta_converter:
  converter:
    pimcore.areabrick.config.brick.converter:
      target: Neusta\Pimcore\AreabrickConfigBundle\Bricks\Model\BrickView
      properties:
        name: ~
        id: ~
      populators:
        - Neusta\Pimcore\AreabrickConfigBundle\Bricks\Populator\BrickPagePopulator
        - neusta_trinity_pimcore.brick.tags.populator
        - neusta_trinity_pimcore.brick.groups.populator

Ok, anyway for me this is no merge avoiding feature. It would be easier to update but it works.

If you find no solution or reason why we should udate documentation there...

[jdreesen]

That's probably because I renamed it to “neusta_ pimcore_areabrick_config.brick.converter”.