patch 8.1.1739: deleted match highlighting not updated in other window

Problem:    Deleted match highlighting not updated in other window.
Solution:   Mark the window for refresh. (closes #4720)  Also fix that
            ambi-width check clears with wrong attributes.
diff --git a/src/highlight.c b/src/highlight.c
index 6eadcd1..d641703 100644
--- a/src/highlight.c
+++ b/src/highlight.c
@@ -3912,7 +3912,7 @@
 	rtype = VALID;
     }
     vim_free(cur);
-    redraw_later(rtype);
+    redraw_win_later(wp, rtype);
     return 0;
 }