Clicking UTM in the Dock (while VMs are running) opens the main UTM window on top each time

**Describe the issue**
When running multiple apps on macOS, it's common to switch between them by clicking the icon in the Dock. For example, after booting the VM(s) I want to work with, I close the main UTM window because I only need the VM windows now. When I'm in another app and want to switch to the VM windows, I click on the UTM icon in the Dock but instead of showing me JUST the VM windows that were somewhere underneath, it does that PLUS opens the main UTM window right on top of everything, each time.

Would it be possible to add functionaliy that registers any running VM window to be equivalent to a UTM window so that it doesn't keep thinking it needs to open a new main UTM window when VMs are open? That way, the functionality will be the same as with Finder in the Dock. When you click Finder, it brings any open Finder windows to the top. If you have none open, it will open a new Finder window. If you want to open a new Finder window while you have Finder windows open already, you can use the context menu of the icon in the Dock to choose "New Finder Window".

**Configuration**
* UTM Version: 2.0.25
* OS Version: Big Sur 11.2.3
* Intel or Apple Silicon? Apple Silicon

**Crash log**
None

**Debug log**
None

**Upload VM**
None