`focused` and `launcher` widgets should only be displayed on the currently focused screen

[bandithedoge]

Is your feature request related to a problem? Please describe. When used on multiple screens, these widget types always display the title of the window on all screens as opposed to only the screen it is on.

Describe the solution you'd like An option to only display the focused window for the current screen, similar to setting all_monitors to false for workspaces.

[JakeStanger]

This sounds feasible, happy to add this to ensure there's parity between the modules.