Merge staging into production, 2023-Aug-08 edition

[jacobdgm]

The staging server has been updated, tests have been run (all are passing), and the password reset link has been tested.

Pages with changes:

• All pages
  • When serving pages on Staging or when developing locally, there's now a small message displayed in the footer saying "STAGING" or "DEVELOPMENT"
  • When serving pages on Production, we add a small script which allows Google Analytics to track traffic on the site
  • When serving pages on Staging, we add an instruction telling search engine crawlers not to index the page.
  • Pagination links: instead of displaying links to the "previous" and "next" pages, we now display numbers for a bunch of nearby pages
• Admin Area
  • Source List: in the search box at the top of the page, you can now search by source ID.
  • Source Change
    • For fields relating to indexers, they are now properly labelled (they used to all say "Chosen Centuries" and "Available Centuries" rather than "available melodies-entered-by" etc.)
    • Names of available indexers are now sorted alphabetically
  • User Change: We now display a message telling site administrators that users' first_name and last_name are never used on the main site, and that they should use the full_name field instead.
• Chant Create
  • We've added a "Copy full text below" button between the two full text fields, modelled on the button on the Chant Edit page.
• Chant Delete
  • path has changed from /chant-delete/<id>/ to /chant/<id>/delete/
  • Formatting has been much improved, and we no longer display the date-created and date-last-updated
• Chant Edit
  • Formatting has been changed, improving the spacing of the save/delete buttons
• Chant Search
  • When a user arrives on the Chant Search page via a global search bar search, the keyword field or Cantus ID field is automatically populated
  • When searching for a Cantus ID via the search bar, we now return chants whose Cantus ID contains the search term, rather than only returning exact matches (this is now the same behavior as using the main Cantus ID field)
• Content Overview
  • For chants and sequences, we now display the object's incipit rather than its fulltext
  • On the Chant and Source Create pages, when a user creates an object, we update the Most-Recently-Updated-By in addition to the Created-By for the object (new objects created since this update will no longer have "Last Updated By: None")
• Feast List
  • Ordering is now case-insensitive
• Genre List page
  • /genre path (à la OldCantus) now redirects to /genres
• Office List page
  • Fixed typo in page title (i.e. the text displayed in the browser tab)
  • /office path (à la OldCantus) now redirects to /offices
• Sequence Detail, Edit
  • refactored permissions check for who can access the Sequence Edit page - permissions should be the same, but the code is now clearer
• Source Create
  • Added missing fields that list users/indexers. All such fields are now filterable lists / autocomplete fields.
• Source Delete
  • This page has been added! It looks similar to the Chant Delete page, but also lists any chants/sequences that will be deleted as a result of deleting the given source. It should be accessible to anyone who has access to the Edit page for a given source.
• Source Edit
  • Added a button to delete the source, next to the existing save button.
  • Fixed bug where non-logged in users would be shown an error message if they tried to visit the Source Edit page directly - now they're redirected to a login page, as they should be.
  • Added missing fields that list users/indexers. All such fields are now filterable lists / autocomplete fields.
  • Refactored permissions check - permissions should be the same, but the code is now clearer
  • RISM siglum field is now a dropdown selector, rather than an unusable enter-the-ID-of-a-RISM-Siglum field
• Source List
  • When a user enters a search term, we now look at unaccented versions of our various fields (i.e. now "krakow" and "kraków" both return the same set of sources)
• Articles-List API
  • Implemented new API listing the URLs of all articles on the site, accessible at /articles-list/
• Flatpages-List API
  • Implemented new API listing the URLs of all flat pages on the site, accessible at /flatpages-list/
• In the background
  • we've set up cron jobs to:
    • regularly back up the database
    • populate chants' next_chant and is_last_chant_in_feast fields
    • run the certbot script to update our certificates