Bug 15859: Move some basic MARC editor controls into settings menu

Bug 15859: Move some basic MARC editor controls into settings menu

This patch moves the following options into a "Settings" menu inspired
by the one in the advanced editor:

- Switch to advanced editor
- Show MARC tag documentation links
- Show tags
- Change framework

To test, apply the patch and open a new or existing record in the
standard MARC editor.

- Test that the 'Switch to advanced editor' button option works.
- Test that the 'Show MARC tag documenation links' option works (and
  that your choice persists across sessions).
- Test that the initial settings for 'Show tags' respects the
  'hide_marc' system preference.
- Test that the 'Show tags' option works (and that your choice persists
  across sessions).
- Test that framework switching works correctly and that the menu
  correctly reflects your choice.
- Confirm that other toolbar functions work as expected, both in regular
  editing mode and Fast Cataloging.

Signed-off-by: Hector Castro <hector.hecaxmmx@gmail.com>
Works as expected.

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Brendan Gallagher brendan@bywatersolutions.com