Custom Data Groups - Slashes or special characters should be transformed in custom data group names

Current, if you use a slash or other special character in civicrm_custom_group.title - the name column is not populated (the record is saved with a NULL value in that column) and the transformation for <div id=...> and the showHide params fails and you wind up with javascript errors on pages where the custom data group is displayed.

To recreate:

• Admin CiviCRM >> Custom Data >> New Custom Data Group
• Enter "Spouse / Family name" as the group title and save
• Dump the saved row and you'll see that custom_group.name is NULL