I want to be able to click an "Expand/Collapse" button somewhere in the Folders pane so that all folders can be instantly expanded or collapsed.
Speaking for myself, with 24+ folders and well over 100 Snippets regularly used, it becomes cumbersome to manually expand/collapse folders. Throughout the course of my day, I may expand some folders, collapse others, etc. when performing snippet maintenance and / or creating new snippets. Having a way to quickly expand/collapse all folders would make it much more efficient to continue working.
Here is a crude mock up of my idea.