Before opening the issue, have you...?

• Searched for existing issues

Is your feature request related to a problem? Please describe

add an option for "when external display exists" show menu bar icon.

The menu bar icon is mostly useful with external display.

Describe the solution you'd like

when select "when external display exists": the icon automatically shows up once an external display is connected and disappears once there is no external display or when only the built-in display is in use.

Describe alternatives you've considered

when select "when external display exists": the icon automatically shows up once an external display is connected and disappears once there is no external display or when only the built-in display is in use.

Anything else?

No response