Expanded Folders
Under What's new, I see you have "Expanded Folders - Now you can keep them collapse/uncollapse if you want your Left Rail less cluttered". However, I am not sure it is working as expected.
I still have to click on folders to open the small window. It goes away if I click somewhere else. I think a couple of weeks ago, the folders list did stay open in the left Rail. It doesn't do that now.
Can you please check this one ?
I also tried incognito mode in case it was a caching issue.

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Hi Vikram, first off thank you for reading our What's New, Tips, etc at the top of the forum. Really appreciate it!
Yes, you can expand the folders. First hover over the edge of your Inbox (left hand side) until you see two arrows, that's how you can expand the left hand column. Then a drop down arrow next to folders will appear. From there you can expand the folders and they will stay expanded until you close the window or logout. Hope this helps!