patch 8.2.3681: cannot drag popup window after click on a status line

Problem:    Cannot drag popup window after click on a status line. (Sergey
            Vlasov)
Solution:   Reset on_status_line. (closes #9221)
diff --git a/src/mouse.c b/src/mouse.c
index c17e26a..77de8d5 100644
--- a/src/mouse.c
+++ b/src/mouse.c
@@ -1630,6 +1630,7 @@
 	if (WIN_IS_POPUP(wp))
 	{
 	    on_sep_line = 0;
+	    on_status_line = 0;
 	    in_popup_win = TRUE;
 	    if (which_button == MOUSE_LEFT && popup_close_if_on_X(wp, row, col))
 	    {