patch 8.1.1969: popup window filter is used in all modes

Problem:    Popup window filter is used in all modes.
Solution:   Add the "filtermode" property.
diff --git a/src/version.c b/src/version.c
index 5dbdc9f..655b68a 100644
--- a/src/version.c
+++ b/src/version.c
@@ -762,6 +762,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1969,
+/**/
     1968,
 /**/
     1967,