I have the latest version of unRAID. I've installed a Windows 10 virtual machine. When I connect to the virtual machine with the Windows RDP, the screen resolution of the virtual machine adjusts itself to the size of the window in which I run it - all the way up to 3840 x 2160. However, when I use NoMachine to connect, I can only connect with an 800 x 600 resolution. In its control panel, the virtual machine shows a display resolution of 800 x 600 and no other. Apparently the VirtIO display