patch 8.2.2064: terminal: cursor is on while redrawing, causing flicker

Problem:    terminal: cursor is on while redrawing, causing flicker.
Solution:   Switch the cursor off while redrawing.  Always add the top and
            left offset to the cursor position when not done already.
            (closes #5943)

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2064,
 /**/
     2063,
 /**/