I'd like to propose we have a checkbox in preferences to turn on "Show Entire Volume" by default. It's the only option I use in the sidebar and hate having to open it every time I want to show it then close it again.
I can see how that can be useful, and it it easy enough to add, so I will add it to the next release. Thanks for the suggestion
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This functionality has been implemented and will appear in the upcoming 1.3.4 release.