Add "The Lounge" label to the landing pages

[astorije]

This is a "better" attempt at displaying the app name on the landing page than #424.

This is not an ideal nor permanent solution, but it negatively affects the design less. It is somewhat temporary until I find the time to add a proper landing page that would:

• Load a sidebar-free page
• Have a "first-time landing" look (app name + maybe special framing, etc.)
• Display either a connect page on public mode or a sign in page in private mode

This will take some non-negligible time and I'll have to sync with @maxpoulin64 depending on what he wants to do regarding the window management, so until then, this PR will do the job just fine and does not compromise on the UI.

[maxpoulin64]

Looks fine to me. 👍 I'm not a fan of the empty header still, but that might be fixed with window management.

[astorije]

I'm not a fan of the empty header still, but that might be fixed with window management.

Correct, I have a few ideas you might like, whenever we get to it (later!) :-)