Gateway: Make the Connect with a Link wizard to show namespace/project from the Join Link provided

[vrubezhny]

Currently, when connecting to a running IDE using a Join Link there is no any workpace/project information displayed on the Wizard page nor in the error message:

This make it possible for users to make mistakes and try connecting to a wrong Dev Workspace (f.i., by using saved link, pointing to a wrong workspace).

We probably must add some valuable information from the link provided that will help users clearly identify the workspace they're going to connect to (or failed to connect to)

[adietish]

@azatsarynnyy: guess changes made here would not be reused in out toolbox implementation?

[azatsarynnyy]

@azatsarynnyy: guess changes made here would not be reused in out toolbox implementation?

@adietish, correct