Add server groups to nodes view

[krimdomu]

We need a group management at the nodes view. The groups should be a nested tree view, at the left side of the server table.

[paulo-graca]

It would be nice if those groups could also be loaded from env files and the nesting could incorporate the env.

[krimdomu]

Hi @paulo-graca,
this is an interesting idea. We will concider this.