Allow the user to set power off timeout for wireless controllers

As discussed on #15 , would be good to create a user defined setting UI to set the power off timeout.

The issue references discussion in #15. Start by reviewing that thread for context on power-off timeout behavior. Look for existing controller management code, likely in driver or UI modules. The change involves adding a user setting, so find where settings are stored and the UI for controller preferences. Determine how the timeout is currently handled and where to inject the new configuration.

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