Google SSO via external Browser window

[tkainrad]

Currently, the Google login with KeyCombiner Desktop happens through the main window. This leads to problems when a user's Google account doesn't allow login from unrecognized applications.

The currently proposed workaround is to set a password so that this can be used as an additional login option. Ideally, KeyCombiner would open a window of the user's default browser and handle the Google login in that window. Unfortunately, it's not trivial with KeyCombiner Desktop's current architecture to pass the authorization details back to the desktop app window.