Use option MAIN_USE_NOTES_IN_DETAILS instead of milestone module

htdocs/core/class/html.form.class.php

@@ -479,9 +479,12 @@ class Form
 			if (1 == $selected) print ' selected="true"';
 			print '>'.$langs->trans("Service");
 
+			if ($conf->global->MAIN_USE_NOTES_IN_DETAILS)
+			{
 				print '<option value="9"';
 				if (9 == $selected) print ' selected="true"';
 				print '>'.$langs->trans("Notes");
+			}
 
 			print '</select>';
 			//if ($user->admin) print info_admin($langs->trans("YouCanChangeValuesForThisListFromDictionnarySetup"),1);