Clarify shortcut usage in Carla simulation mode (#1724)
Clarify shortcut usage in Carla simulation mode (#1724)

The keys to control openpilot have to be pressed with focus on the
terminal running the Carla bridge.
Also improve table formatting.
commaai/openpilot,commaai/openpilot,commaai/openpilot,commaai/openpilot,commaai/openpilot,commaai/openpilot