Bring Private Key File Input back to launch window
Somewhere along the way, loading the private key file got buried inside the "Advanced" options. I used an old version of WinSCP that was loaded on a machine recently, and remembered how convenient it was to have this selection right on the Login window rather than having to dig through the settings every time. My server targets change frequently, but use a common key, so saving the sessions isn't really an option. This would be great to have back on the login screen.
