[ ] Editor
    [x] Store / retrieve state in localStorage
    [x] Select / deselect all checkeboxes at once
    [x] Add information about point locations
    [x] Add information about the current curve
        [x] Delay changing tooltips between lines
    [ ] TODO: Why SVG does not smooth on path control points on checkboxes?
    [ ] TODO: Find how to set fill on embedded SVG.
    [ ] BUG: In Chrome DevTools with dimentions responsive pointer events move points to negative coordinates.
    [x] When loading points, make sure the coordinates are inside SVG boundary.
    [ ] Controls poins
        [x] Allow drag points
        [x] Add / delete points
        [ ] Deduce drag events
        [x] Add point numbers
        [x] Add buttons +/- to modify number of points
        [x] Add disabled state for +/- buttons
        [x] Position buttons menu over SVG extra menu
        [ ] Add italic font for inactive buttons
        [ ] Define stroke and shadow colors
    [ ] TODO: Why jotai does not provide prev value access in update atom function?
    [ ] Add colors schema.