Auto Update the view

[meguiraun]

to have a selectable option of auto update the view in real time (same as in the old archiver).

[johanfforsberg]

I think the simplest possible version of this needs only some functionality in the frontend:

1. Move the view forward so that the current time is at the right border
2. Fetch data.
3. Wait
4. Goto 1 :)

I suggest a simple dropdown somewhere with a few preset time periods; e.g. "Off", "10s", "30s", "2min", "5min", or something.

Hopefully the cache in the backend is smart enough so that this won't be a performance issue, since it should only fetch data that has arrived since the last fetch. Unfortunately the plot still needs to be recreated from scratch each time.

[meguiraun]

@johanfforsberg ! glad to see you around!!! Thanks for your tips