patch 8.1.1690: default padding for popup window menu is too much

Problem:    Default padding for popup window menu is too much.
Solution:   Only add padding left and right.
diff --git a/src/version.c b/src/version.c
index 19c04a5..0c56f7d 100644
--- a/src/version.c
+++ b/src/version.c
@@ -778,6 +778,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1690,
+/**/
     1689,
 /**/
     1688,