Add option to remove the name of the website from the banner

[anacarnil90]

To whom it may concern,
it would be nice to have an option not to display the name of the website on the image banner, at least for the Home page, e.g. in https://p3h.particle.kit.edu/start "Collaborative Research Center TRR 257" on the picture should disappear.
Thank you very much for your work and help.

Best