TutorialMode not working

[LukasOsti]

Further bugs:

• [x] (X) should be top-right but is currently positioned under the tutorial's title
• [x] "drang and drop" is an inside joke and should be removed (-> drag and drop)
• [x] Remove hint for model info, as #10 is not available as of now
• [ ] Move Tutorial Button to the bottom right
• [ ] Remove blocking the collaboration dialog
• [ ] Do not show the tutorial when joining via collaboration

[h3ssto]

Added additional QoL Fixes