Rather than using the menu drop down button, I would integrate that into the title of the right panel, so you click the title of the panel and that brings up the options for each section like "Add Tokens, Map Details" etc. I'd also move the exit campaign button out of that menu as it doesn't really affect the right panel so it doesn't feel like it belongs there. I think I'd put it on a permanent overlay in the top left corner over the dice history, and maybe have a confirm exit pop up modal with a setting to turn the modal off. I think I'd also add a way to collapse the dice history panel.