Set of tweaks to Nextcloud Notes onboarding
- Users with SSL certficate errors (which weren't related to self-signed certificates) were getting shown a generic failure message. They now get pointed to their certificate.
- Users were being directed to login to Nextcloud in their browser before we had even made a connection to the server. If they eg. entered a wrong address they might have gone and looked in their browser when nothing was there to see.
- An incorrect message was being logged when there was no stored password eg. after logging out of sync
Closes #154 (closed)