Go Back Feature

It would be nice to have a "Go Back" feature. The "Go Back" button (maybe assign a shortcut key) would take you back to the previous module you were viewing. Many times, I get interrupted when editing a module and want to go back to the previous one. Because of the interruption, I can't remember where I started from. Perhaps the button could retain a history of the last 5 number of module views. Clicking the button itself would go back to the previous or using the dropdown arrow next to the button would reveal the last 5 modules views.