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.

src/version.c

@@ -767,6 +767,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1420,
 /**/
     1419,
 /**/