Implementation of Navigate Recent Projects

As specified in the [this](https://trello.com/c/oTZbF8NI/878-navigate-recent-projects) Trello card, `CTRL+ALT+R` opens the recent project dropdown, `up` and `down` moves to the next and previous item and `enter` triggers a click event`on the currently selected item, which goes to the selected project or opens a new folder (if that item is selected).