Lacking "key file" description in the UI

[postcd]

Hello,

the key file description can be confusing. The dialog where one edits server to connect to (Site manager). They can select Logon type "Key file" and then enter the path to it. But newbie may assume that they need a key to the server they want to connect, not local key.

Why i am saying this? Because it accepted my local key /home/myusername/.ssh/id_rsa and connected to remote server...

Maybe better describe it so it is more clear or prefill the local key path like shown above by default, maybe even when no path is used. Error/information boxes on failure should describe in detail what to try.