[admin] Implement "go to" in huge subnet UI

[nemesifier]

Continuation of openwisp/django-ipam#89.

It would be good to add a way to directly go to a certain address (in the subnet) without having to scroll all the way through.

The case in which an address that is not part of the subnet is entered should be covered, a simple error message will do.
The operations have to be asynchronous (use JS as the infinite scroller).

[pawelplsi]

@nemesisdesign Somebody else has already taken issues I wanted to work on before, so starting working on this one 😄

[nemesifier]

@pawelplsi ok go ahead 😊

[pawelplsi]

@nemesisdesign How should it's GUI look like? Something like a search bar, where you have to enter entire IP address, above the visualizer would be okay, or do You have some better idea?

[nemesifier]

@pawelplsi yes something like that, keep it simple and make it work, once we get it working I'll think about how to make it look better if needed

[lehone-hp]

@pawelplsi are you still working on this issue because i will like to work on it

[nemesifier]

@lehone-hp I think you can go ahead because the last comment on this was more than 2 weeks ago.

[pawelplsi]

Okay, you can go ahead @lehone-hp

[pawelplsi]

Are you still working on it @lehone-hp?

[NoumbissiValere]

@pawelplsi you can go ahead and work on the issue.