patch 8.1.1628: popup window functions not in list of functions

Problem:    Popup window functions not in list of functions.
Solution:   Add popup window functins to the list of functions.  Reorganise
            the popup window help.
diff --git a/src/version.c b/src/version.c
index 0620a21..4ce422a 100644
--- a/src/version.c
+++ b/src/version.c
@@ -778,6 +778,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1628,
+/**/
     1627,
 /**/
     1626,