Bug 33478: Save notice format settings

Bug 33478: Save notice format settings

Save format settings for an individual notice, or for all notices
This patch implements a single style field for a slip to allow for advanced CSS customisation of printed notices. There are links to insert selectors as helpers. Styles can be applied for an individual notice, or all notices.

To test:

1. Apply the patches, install database updates, update schema if needed, and restart services
2. Go to Tools -> Notices and slips
3. Edit any notice
4. Go to the Format tab
5. Confirm there is a textarea for CSS, and links to insert helpful selectors for IDs like #receipt and #slip
6. Add some CSS and confirm it saves.
7. Test that 'apply these settings to all notices' option works. Test the confirmation box appears when this is checked.
8. Add a new notice and confirm CSS settings save successfully
9. The subsequent patches have specific testing plans for each printable notice. For each, confirm that SlipCSS stylesheet changes are applied first. Specific notice styles should be applied last.
10. Test with a non-HTML notice as well, such as RECALL_REQUESTER_DET. Plain (non_HTML) notices have always come with <pre> tags around them so the text is formatted slightly differently but any CSS from SlipCSS or the notice Format should still hold.

Sponsored-by: Colorado Library Consortium
Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>