[BUG] Backup regenerates controller

[PaTara43]

1. Development/Production
dev.robonomics.app

2. Page Address
rws-setup

3. Error Info/Story
When I click download backup for server for an existing setup it offers me to insert a password for a NEW controller account even though I have one. And then it creates a NEW controller and downloads a backup file with the NEW controller instead of my existing one. This new controller is not in the subscription ofc

4. Expected behavior
It should just download my backup json

5. Console logs

6. Context
Browser: Chrome
Dapp release: 421bcb7

[PaTara43]

I understand that the dapp can't store the seed

I would suggest to either warn that the controller will be regenerated (and add tthe new one to subscription)

Or provide the opportunity to insert seed of the previous controller