This will disable the remote control panel and associated actions
entirely. This is useful when the remote control is not needed or when
the user wants `tv` to run in single-channel mode (e.g. when using it as
a file picker for a script or embedding it in a larger application).
BREAKING CHANGE: the CLI `passthrough_keybindings` are no longer
available. This feature wasn't used anywhere to my knowledge (github
search) and was adding unnecessary complexity to the code.