About this I was thinking that this solution could fit most cases, for quick Alt+Tab / Alt+`:
- If an application has some normal windows opened and optionally some transient windows: both quick Alt+Tab and quick Alt+` switch between main windows.
- If an application has only one normal window and one (or more?) transient: quick Alt+Tab should switch to another application, quick Alt+` switch to the transient window.
Long Alt+Tab / Alt+` should allow to switch to any application/window.
About this I was thinking that this solution could fit most cases, for quick Alt+Tab / Alt+`:
- If an application has some normal windows opened and optionally some transient windows: both quick Alt+Tab and quick Alt+` switch between main windows.
- If an application has only one normal window and one (or more?) transient: quick Alt+Tab should switch to another application, quick Alt+` switch to the transient window.
Long Alt+Tab / Alt+` should allow to switch to any application/window.