I just downloaded and started using Spacedesk. Everything works great except for one thing. The sidebar on the left hand side of my second screen doesn't close automatically and there is no option to close it. This means a good chunk of the extended screen is just hidden behind the sidebar. My main computer is running Windows 10 and the extended display is an old Macbook running Mojave and connecting via browser HTML5. Is this the result of older software or am I missing something?