Improve manual account settings

[robert-virkus]

Is your feature request related to a problem? Please describe.
Currently the manual account settings are not structured well and do not provide hints of a given field needs to be filled out.

Describe the solution you'd like
Provide the following settings sections:

• Required Settings
  • Email address
  • Password
• Email Servers
  • Incoming server, hint text: IMAP server address
  • Outgoing server, hint text: SMTP server address
• Advanced Settings (foldable, by default collapsed)
  • IMAP Settings
    • IMAP Login Name, hint text: Same as email
    • IMAP Login Password, hint text: Same as password
    • IMAP Port, hint text: Detect automatically
    • IMAP Security, Options: Automatic, SSL/TLS, StartTLS, Off
  • SMTP Settings
    • SMTP Login Name, hint text: Same as email
    • SMTP Login Password, hint text: Same as password
    • SMTP Port, hint text: Detect automatically
    • SMTP Security, Options: Automatic, SSL/TLS, StartTLS, Off

Describe alternatives you've considered
A clear and concise description of any alternative solutions you've considered.

Additional context
Add any other context or screenshots about the feature request here.