I'd like to be able to hide labels or folders in the list seen in Proton Mail. As I use more labels or folders I don't need to be able to see all of them, in fact they start to clutter things up. For older archived items in particular I want to be able to apply a label or move to a folder but this doesn't need to be visible day to day. This feature is available in Gmail and is one of the things it does better for organising large mailboxes.