Provide a "host key" like VirtualBox

In VirtualBox, you can set a key (or combination of keys?) that is captured by VirtualBox and not forwarded to the VM. This key can then be used in combination with other keys to provide shortcuts to the functionality provided by the hypervisor.

I would like to have this feature in UTM. I am not sure if this needs to be done by QEMU team or not, so I am starting here. I have a password manager that has a global shortcut to fill in a username and password in the foreground window. This does not work when I am in a VM, because all keys (or most) are captured by the VM. If there were a host key and some configurable functions, I could pass the remaining keys in the combination back to the host OS.