Connection form redesign

User Story

As a user,
I want a way to be able to access advanced connection settings
So that I can always connect to any MongoDB with most connectivity and authentication options available to me

Acceptance criteria

• The overview page contains a form with all the advanced connectivity options
• Connectivity/auth options are logically split so that I am not overwhelmed by a form with a million fields all on the same page
• When I connect successfully the connect screen is in its Connected state
• When the connection is not possible due to an error, the error is displayed in an error notification
• Check that VSCODE-154 does not happen

Notes

• This user story is only about restructuring the connection form accordingly with the new design. VSCODE-173 will then be about moving the form into a dialog.
• Kerberos is still not supported