Marker: Greater control over animation

[TBarregren]

What problem does this address?

Current situation: The animation now consists of two parts: first, the mark is drawn, then there is a pause. The duration of the entire animation (both the drawing and the pause) is specified in a drop-down menu.

Feature request: More options for setting up how the animation should work.

Proposed solution

1. When the animation should start: (i) After a delay in milliseconds (which can be 0) after the marker becomes visible in the viewport. (ii) After the marker has reached a specified percentage (which can be 0) from either the top or bottom of the viewport.
2. The duration in milliseconds of the drawing animation itself (> 0 ms).
3. The duration in milliseconds of the pause before the animation repeats (including 0).
4. The number of repeats (any non-negative integer including 0 or infinity)
5. What will happen after the last repeat: hide or show

Additional context

No response