Background: on Outlook servers and possibly on other providers as well, connect can fail with a UserError.
Before this fix this results in the form view not being able to open because the compute cannot complete.
This fixes that, so that the connection error may be resolved by the user.
Now it is impossible to confirm a connection to a imap server if there is a problem
in one folder. This commit provides a new state field on the folder and e separate
comfirm button per folder.
Tom
Ronald Portier
Nikos Tsirintanis