faces/grid: Pass updateRateLimit through to internal per-face controller
- faces/grid: Specify updateRateLimit for FaceLoader
To ensure we pass the updateRateLimit from the parent controller on to the internal per-face controller.
- faces: Explicitly emit signals on internal controller on property change
Some properties in the face controller end up sharing config groups, which results in only a single face being notified instead of all faces. To mitigate that, ensure we always emit change singals for the internal controller when we're setting a property.
- faces: Allow specifying updateRateLimit for FaceLoader
So we can pass it through to the internal face controller.