Workspace switcher: Show app icon only once, or prioritize showing others

### Problem

Switcher is cool, but this workspace has several different apps running (4, actually). Here we get four time the same one because it has four windows. So this "preview" of the workspace does not convey efficiently the content of the workspace

### Proposal

Show the icon for an app only once

or, prioritize showing all the apps before deduplicating one

### Prior Art (Optional)

_No response_