Subview-like back arrow for "Media" and "MusicAssistant"

The Subview feature is a simple yet great new feature in 2022.10. I would like to see that back-arrow feature on the “Media” window as well as the first level of the “Music Assistant” (the subsequent child windows of MASS already have them). I don’t care if they are actually hidden in Navigation pane or not like “regular” subviews, but having a back arrow is key.