end markers should inherit stroke paint

[Vanzandt]

Start, Mid, and End markers are currently always black.
 They should inherit the color from "stroke paint", at
least for the "flat color" case.

[Buliabyak-users (buliabyak-users)]

Thanks for reporting, this is a duplicate of

https://sourceforge.net/tracker/index.php?func=detail&aid=995815&group_id=93438&atid=604306

[Troy James Sobotka (troy-sobotka)]

Trying to tie up the loose ends of this bug that point nowhere.