A recent bug has proven that the service worker cache refresh does not
yet work as intended and can lead to a bug where the entire app does not
load. It therefore has been disabled for now.
This improves the design of the session view a lot. However, several
things still need to be done:
1. The rules section is not styled.
2. The session list is not styled.
3. The design is not responsive yet. This will take longer, as the base
view will need to be overhauled substantially to take advantage of
wider screens.
4. A light mode needs to be added.
The previous implementation only looked at the URL (and state) during
initialization. This allowed users to open a specific session via URL
(e.g. when reloading the page).
History navigation, however, was completely ignored. I.e. if the user
pressed the back button the URL would change, but the content would
remain the same.
This has now been corrected.
