I’ve released a custom.js snippet to collapse namespaces here (the prefixes are collapsed as ../ with a hardcoded color, to see the full page-name, either enterr Edit Mode or use the Hover Preview Tooltip) :
demo: 
it’s bundled with another snippet to adjust the width of query tables, but it’s easy to extract/copy the namespace section only (just be careful to copy the mutation observer section at the top of tfile too).