[BUG]: Notification container covers critical OPAL interface

[cornzz]

What is the bug?
While trying to remove myself from some groups on the page /opal/auth/resource/groups, I noticed that the "leave" buttons on the lower half of the screen were not clickable. Turns out they were covered by the empty notifications container of TUfast. This bug also affects other pages (mostly those found under the "Lehren & Lernen" tab), though not all.

Screenshots
https://github.com/TUfast-TUD/TUfast_TUD/assets/39997278/38138141-3a0f-486d-98da-5f682e9e910c

What system are you running?

• What browser (e.g. chrome, firefox)? FF
• What version of TUfast (if you know how to find out)? 8.0.0.1

Anything else that is important?
Simple fix: change height of the notification container from 50vh to fit-content so it automatically shrinks to the size of the displayed notification (if any).