[Hotfix] Credits Tab, Fix hanging app on close

Small hotfix for ya here!

Credits Dropdown

This update includes an all-new credits dropdown in the settings menu. This dropdown is dynamically updated right from GitHub, shows the number of commits to the main VRCFT repo and links back to each contributor's GitHub profile. Thank you all <3

Fix for hanging app

Well dang, those last couple of updates were quite a mess! Turns out I may have accidentally left a bit of unfinished code in the release relating to calibration, this caused the app to not close properly as well as crash on startup for lots of people. I'm really sorry, though this should be fixed now! We'll get the calibration stuff back in and fully working in a future update :)

Thanks again everyone, you have no idea where I'd be without you all 💙

Full Changelog: 5.0.2.2...5.0.2.3