patch 8.1.1778: not showing the popup window right border is confusing

Problem:    Not showing the popup window right border is confusing.
Solution:   Also show the border when there is no close button. (closes #4747)
diff --git a/src/version.c b/src/version.c
index 281e7e2..4ae1905 100644
--- a/src/version.c
+++ b/src/version.c
@@ -778,6 +778,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1778,
+/**/
     1777,
 /**/
     1776,