patch 8.2.2366: when using ":sleep" the cursor is always displayed

Problem:    When using ":sleep" the cursor is always displayed.
Solution:   Do not display the cursor when using ":sleep!". (Jeremy Lerner,
            closes #7688)
diff --git a/src/term.c b/src/term.c
index 5d1228d..47e5dfd 100644
--- a/src/term.c
+++ b/src/term.c
@@ -2713,7 +2713,7 @@
 		else
 		{
 		    ++p;
-		    do_sleep(duration);
+		    do_sleep(duration, FALSE);
 		}
 # else
 		// Rely on the terminal library to sleep.