Prevent saving of double connections

[tobimori]

[matthiaaas]

Is this necessary? Not sure if you should block this. Because to save multiple connections you have to reload the view so the button becomes enabled again.
Probably there are use cases for double saves.

[tobimori]

@matthiaaas Why there should be a use case? You save paths per user/host, not mehr QuickConnect connection and you can't jump between two of the same connections with QuickConnect.

I'd replace the save connection icon with a filled out icon to unsave the server when all details are the same, and save it with an unfilled icon.