Add a Scale

[Pseudorandom-Pseudonym]

Is your feature request related to a problem? Please describe.
It's difficult to get a sence of scale without...you guessed it; a scale.

Knowing how big things are can help in identify features. Projects display imagery set to differnet zoom levels, depending on what project creators think is best. Therefore, even though mappers cannot change the zoom level of imagery (like they can in a validate type task), the squares do not necessarily envelope the same area.

Describe the solution you'd like
Please add a scale with toggable visibility. One is already present in validate type tasks (though not togglable). The scale should be approximately the length of a task square (or some multiple thereof), so that the squares can be easily subdivided to obtain approximate measures of features. The scale should have either, notches at regular intervals and/or alternating colour changes at regular intervals, to increase the resolution of subdivisions. I could have both metric and imperial units, or the user could select which units they would like to use.

Project creators/managers could even select a scale length if there is one that's particularly useful in a given context.

Describe alternatives you've considered
Guessing the distances based on features you can positively identify.

Additional context
I know there's a scale in the mobile version on find tasks, and validate type tasks on the web version that even automatically adjusts depending on zoom level.