Autosave controller

[nakata5321]

Problem

After generating the controller address during creating "server setup", the controller address don't save in "SUBSCRIPTION SETTINGS" automatically. This may lead to loose the controller address by user.

Proposal

Save the controller address automatically after generating "server setup", or at least ask user during server setup to save this address

Additionally we can auto add the controller address to SUBSCRIPTION list.

[nakata5321]

tested on b4c699b

[PaTara43]

still actual 421bcb7
more that, the address is regenerated easily in the magic account creation pop-up, leads to loss of controller account. It would be great to offer to add the generated address in subscription in the pop-up (right now this button regenerates account) "Created, Сheck downloads"