patch 8.2.1769: popup filter interferes with using :normal to move the cursor

Problem:    A popup filter interferes with using :normal to move the cursor in
            a popup.
Solution:   Do not invoke the filter when ex_normal_busy is set.
diff --git a/src/evalfunc.c b/src/evalfunc.c
index b387c8c..2af4bc0 100644
--- a/src/evalfunc.c
+++ b/src/evalfunc.c
@@ -2616,15 +2616,15 @@
 		msg_scroll = FALSE;
 
 		if (!dangerous)
+		{
 		    ++ex_normal_busy;
+		    ++in_feedkeys;
+		}
 		exec_normal(TRUE, lowlevel, TRUE);
 		if (!dangerous)
 		{
 		    --ex_normal_busy;
-#ifdef FEAT_PROP_POPUP
-		    if (ex_normal_busy == 0)
-			ex_normal_busy_done = FALSE;
-#endif
+		    --in_feedkeys;
 		}
 
 		msg_scroll |= save_msg_scroll;