patch 8.1.1420: popup window size only uses first line length

Problem:    Popup window size only uses first line length.
Solution:   Use the longest line. (Ben Jackson, closes #4451)  Also deal with
            wrapping lines.
diff --git a/src/version.c b/src/version.c
index 089b44f..00eaacb 100644
--- a/src/version.c
+++ b/src/version.c
@@ -768,6 +768,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1420,
+/**/
     1419,
 /**/
     1418,