patch 8.1.1329: plans for popup window support are spread out

Problem:    Plans for popup window support are spread out.
Solution:   Add a first version of the popup window help.
diff --git a/src/version.c b/src/version.c
index 74dba7c..8defe6a 100644
--- a/src/version.c
+++ b/src/version.c
@@ -768,6 +768,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1329,
+/**/
     1328,
 /**/
     1327,