The patch I initially merged which implemented this was old, as I mentioned. Perhaps as a result, it was outdated with regard to how shelf configs worked. Perhaps not. Either way, this works now and I added an option to rename shelves from the menu.
Miscellaneous fixes today included a shelf/screen creation bugfix from raster and lots of cleanups to shelf naming dialogs. The big feature add of the day:
EFM now allows renaming by clicking the title of an icon like other file managers. It also doesn’t try to go to nonexistent parent directories from shortcuts anymore.