[Feature] Dual-factor auth

[User-green]

💡 Feature Description

I would like the app to be able to use bouth password and key login at the same time.

🤔 Problem Statement

When useing publickey,password authification type, the app can not connect.

🛠️ Proposed Solution

Merge "Private key" and "Password" tabs.
Use "Lave empty for none" designe.
(F.e. "Password: Leave empty for no password")

🔄 Alternatives Considered

Do not add the feature.
Few people use dual-factor auth, it might be best to leave it be as is.

📋 Additional Context

N/a

📊 Benefits

This will somewhat extend project reach.