React (with hooks), css, webpack, sortable.js

Any feedback is welcomed.

I'm aware of a few problems :

1. Focus state on mode switch is annoying on mobile, should exist only on desktop
2. Currently due to some bugs, I had to remove option for preserving todos order after sort. I will think about solution later.
3. I should probably set some min-width on few elements to preserve circle indicators shape.

Accessibility issues are most important to me right now, but any other tips are appreciated.