Display param when entering param screen

[arthurbenemann]

Since #976 we are downloading parameters on connection.

So when entering the parameters settings screen they should already be loaded on the screen, without the user needing to refresh the screen.

[squilter]

Also, if someone goes directly to the parameters screen after connection (while the param download is in progress) it would be good to show the progress bar so that the user knows that there is already a param download in progress.

[m4gr3d]

Fixed by PR #1098