Step 8: about me, wait animation, toast

First of all, check out this wait animation, isn’t it cool?

A little demonstration of the new features: About Me field with markdown support, Edit Own User Record dialog, toast, number formatting.

This is the best feeling when you can trust your end to end tests. We don’t have much test coverage on the backend yet, but the frontend is covered quite thorougly.

I’ll let the code explain itself for this PR – let me know if you need help with it, or have any other feedback.