EditText: color all markdown symbols in gray

[korelstar]

Coloring all markdown symbols for which the respective formatting was applied (especially # in headings, */_ in emphasizing, > in quotes) would

• increase readability of the text,
• allows to concentrate on the content,
• puts the technical aspects of markdown into the background
• and still allows for the editing of these symbols.

Here is an example, where this is used:

However, I don't see that this is useful for lists. But for headings, emphasizing and quotes, this would be very nice.