* Proporly handle multiple conditonal layers w/ the same target
`then-layer` values.
* Move handling to work callback, to avoid re-entrance for cascading
layers enabling other layers.
* Allows removing multilib from docker images
* Run properly in aarch64 host docker
containers for testing on Rasberry Pi.
* Small sticky-keys fix to initialize w/ correct
constant for max uin32_t value.
Peter Johanson