Bug 19768: Add "Title notes" tab to OpacSerialDefaultTab preference

Bug 19768: Add "Title notes" tab to OpacSerialDefaultTab preference

This patch adds a "title notes tab" option to the opacSerialDefaultTab
preference.

To test, apply the patch and restart services.

- Go to Administration -> System preferences -> opacSerialDefaultTab.
- There should now be a new options, "title notes tab."
- Set the preference to the new value.

- Go to the OPAC and locate a bibliographic record which is associated
  with a subscription and which has data in a 5XX notes field.
- On the bibliographic detail page the "Title notes" tab should be
  selected by default.
- Test that the other system preference values still work correctly too.

Sponsored-by: Athens County Public Libraries
Signed-off-by: Laura Escamilla <laura.escamilla@bywatersolutions.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>