Summary:

- allow for customization of a control behavior by changing the existing or adding new key mappings
- support dynamic modification of key mappings
- allow for accessing the default functionality even when it was overwritten by the application
- allow for reverting customization to the default implementation
- guarantee priorities between the application and the skin event handlers and key mappings
- allow for gradual migration of the existing controls to use the new InputMap
- support stateful and stateless (fully static) behavior implementations

For more detailed introduction, see
https://github.com/andy-goryachev-oracle/Test/blob/main/doc/InputMap/InputMapV3.md