Increase limit for pinned inboxes in sidebar to over 500

If you are using Front as a one stop email service for personal email as well as work, 500 pinned inboxes/folders really isn't enough, especially if you are in sales and break up your prospects/customers into individual pinned tags/inboxes/views. On the personal email side, if you use folders for house, auto, vacations, etc. it all adds up very quickly.