patch 9.1.0103: 'breakindentopt' "min" not correct with 'signcolumn'

Problem:  'breakindentopt' "min" works incorrectly with 'signcolumn'.
Solution: Use win_col_off() and win_col_off2().
          (zeertzjq)

closes: #14014

Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

src/version.c

@@ -704,6 +704,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    103,
 /**/
     102,
 /**/