Undocumented events

I've noticed that there are events in the in-game control settings and associated standard.xml that aren't documented in the SDK, i.e. the Concorde visor controls.

These still work, but it's not clear why they are omitted from the SDK. If they are legacy and to be deprecated, it would be good to have warning.

Also, there are an enormous amount of events that don't have associated entries in the control options so keys cannot be mapped. Some are really obscure and likely only of interest to developers building simpits with hardware interfacing SimConnect clients, but others are pretty standard cockpit fare, like the hydraulics switch, which is unmappable though the event exists.

It would be good if future SDKs could allow us to add events to the in-game options if they exist.