This was reported for duplicating particle systems, then using F9 to
enable the 'Duplicate Settings' option (see T83317).
In this case, the operator gets the particle_system from (buttons)
context and if none can get found will duplicate all settings instead.

The reason why none gets found here is that buttons_context() doesnt
have a valid path when called from F9, it can be recomputed though to be
valid even from F9.

Not totally sure at which point ButsContextPath get invalid tbh, but it
seems safe to recompute if it is?

This was likely causing other operators (relying on buttons context)
from the Properties Editor to fail as well.

Fixes T83317