core: add buffer property "modes"

src/core/core-upgrade.c

@@ -523,6 +523,9 @@ upgrade_weechat_read_buffer (struct t_infolist *infolist)
         ptr_buffer->title = (str) ? strdup (str) : NULL;
     }
 
+    /* modes */
+    gui_buffer_set_modes (ptr_buffer, infolist_string (infolist, "modes"));
+
     /* first line not read */
     ptr_buffer->lines->first_line_not_read =
         infolist_integer (infolist, "first_line_not_read");