Post-release code cleanup of some metadata inheritance code

[marcellamaki]

Observed behavior

As discussed in the PR for MVP implementation of the metadata inheritance modal, some of the code is quite long, and the readability could be improved.

Dev-facing consequences

It could be harder to maintain this code or spot bugs. May be trickier for others to contribute in this area with enhancements or bug fixes.

Context

Studio Bulk Editing release - unstable as of August 30 2024