Separate folder list for multiple accounts

I am running two mail accounts, but the folders are displayed in the left column for all accounts at the same time. I know I can hide folders, but what is the use of seeing the folders for the account I am not currently using?

Postbox/Thunderbird does this separation by first showing your accounts at the top of the left column and then displays the folders for the open account below. Any chance we can get this type of feature?