Input Enumeration Name Overrides

[chyyran]

Need an API to manually specify the DefaultLayout in an enumerated input device. Also need some API to get a DeviceCapabilty to String function.

[chyyran]

#594 addresses the API side, we need a story for serialization. Do we want to continue with JSON?

[chyyran]

In code, we should parse as JSON. Maybe we can introduce TOML support as a preprocessing step, but the final representation should be in JSON

[chyyran]

fwiw this is low priority.