"Clear Change History": cloned document markers are not cleared

**STR:**
Clone a dirty document to the other view.
"Clear Change History".

**Result:**
The History markers in the other view are visible until you activate it.

**Ref:** https://github.com/notepad-plus-plus/notepad-plus-plus/pull/13861#issuecomment-1627375067.

***

Master: https://github.com/notepad-plus-plus/notepad-plus-plus/commit/ebdc910dcd7bf0577b8d54f6c6cb0fd2e1f6f703.