#8 bindings: <C-h> = :prev-tab<Enter> broken in 0.6.0 2 years ago

Ticket created by ~dmfay on ~rjarry/aerc

Thank you for reactivating the project!

After I updated to 0.6.0, both the :prev-tab command and my next-tab bind work as they had in 0.5.2, but the prev-tab binding has no effect. I looked at the recent binding commits and nothing jumped out at me as the probable cause.