Consider rewriting "Manage references" page using htmx

[spookylukey]

• Instead of a separate window for actions, have an almost full screen modal, which can be htmx driven
• When finishing these actions, do the page partial updates using htmx. The trickiest thing here is moving the content into the correct order after updating. This may require some custom javascript that triggers off the htmx:afterSettle event.

[spookylukey]

Done in 37918f4