Merge staging into production

[dchiller]

To test:

General User-facing

• Instances of "Manuscript" replaced with "Source" (See full list at Replace instances of "Manuscript" with "Source" #1470)
  • Page titles
  • Help text for source.title field
  • Chant Detail, Create, Edit full text fields (e.g. "Manuscript Reading Full Text (Standardized Spelling)" --> "Full text as in Source (standardized spelling)"
  • Source create
  • Chant search
  • full inventory page
• Custom 500 error page (Nginx: add custom 500 page, refactor error page static files, add simple password #1520)
• Simple password on staging server (Nginx: add custom 500 page, refactor error page static files, add simple password #1520)
• Reorder sources by date_updated on My Sources page and sidebar (Reorder sources by date_updated on My Sources page and sidebar #1472; Fix ordering in "My Sources" page #1504)
• Footer logos updated (Update footer logos #1482)
• Give superusers all edit access (Fixed: Allow superusers all access #1531)
• Send search bar to top of page on narrow pages (Send portions of sidebar to top on narrow screens; fix global search bar on dynamic pages #1537)

Chant pages

• Benedicamus Domino project-specific fields are available on Chant Create and Chant Edit pages (Update Chant model and related forms for Benedicamus Domino-specific fields #1473; Comment out chant segment and BD-specific fields on chant forms #1522; Add Project model for chants & return segment to a source-level object #1548)
• Chant pages no longer give 500 errors on bad text characters (@dchiller to add specific example chants) (Upgrade to volpiano-display-utilities 1.1.3 #1487)
• Proofreader fields are preserved after contributor changes on chants (Preserve proofreader fields for contributor changes on chants #1501)
• Cantus Index input tool re-implemented (Re-implement cantus index input tool #1538)
• Chants can be created and edited with a project (Add Project model for chants & return segment to a source-level object #1548)

Source pages

• Indexing notes in sidebar get safe template filter: check whether the sidebar appears normally in source 123672 (Use safe template filter for source.indexing_notes in sidebar #1488)

Search pages

• No more duplicate results in source search (Fix duplicate results in source search  #1481)
• Sort headers on chant search page work when accessed by global search bar (Fix sort headers on chant search page when using global search bar #1497)
• Global search bar suggestions work on all pages (Send portions of sidebar to top on narrow screens; fix global search bar on dynamic pages #1537)

General Back-end

• Test management command that reflects cantus ID merge events (Add Management Command to Reflect Cantus ID Merge Events on CI to CD #1479)
• RISM siglum model removed
• Cron script on new servers (Fix cron script issues related to docker version upgrade on new servers #1490)
  • Database backups are made
  • Management commands successfully run (Update manage.sh to include new path to docker executable #1503)