Add App deployment configuration

[SchoolGuy]

Fixes #76

This is a follow-up for #207

• Add deployment configuration file
• Add logged in server to NavBar above version
• Modify login to allow selection of urls from deployment configuration file
• Default project is Cobbler so updated README to include --project is required for ng generate

Edit: I updated to rxjs7 with this PR.

[SchoolGuy]

This doesn't work as intended at the moment because the APP_INITALIZATION token would slow down the application which we don't want because the user potentially has to wait to see the page because the connection is slow. Getting this to work with async code didn't turn out to be a five-minute job. Investigating tomorrow.

[SchoolGuy]

Now this works fully async and even hides the input if only one entry is specified. The rest of the requirements from the issue are also implemented. As such the input shows when either no config is present or more than one server is given in the configuration file. The input is proposing options via the autocomplete functionality.