how it works
- Create todo: Enter
- Edit todo: just write something on it
- Navigate between todos: ArrowUp and ArrowDown
- Nest a todo: Tab
- UnNest a todo: Shift + Tab
- Toggle a todo: Shift + Enter
- Toggle all todos below: Ctrl + Shift + Enter
- Delete a todo: Backspace on empty todo
- Delete all completed todos: Alt + Shift + Enter