Description

This PR improves the "rebinding sample" in the following ways:

• Adds a "swap bindings" button to showcase how to swap two similar bindings. This is currently applied to the move and look actions of the gamepad control scheme.
• Improved RebindSaveLoad by documenting it and extracting Load/Save to API surface of the class and only calling them from OnEnable/OnDisable. Also made the actual PlayerPrefs key a string property of the component. This allows this file to be a reusable component as-is is nice there is nothing hard-coded and it may be used on OnEnable/OnDisable or just programatically.
• Removed delta action binding from "Look" action since it is intentionally ignored by rebinding framework. This control is now instead replaced by a UI slider allowing to control/override mouse sensitivity of the associated action and persist the setting across runs.
• Refactored rebinding sample custom editor code to reduce code bloat and enable code reuse via composition.
• Extended "Reset All" button to also reset look sensitivity for "Keyboard & Mouse" scheme.
• Added RebindActionParameterUI which is a slider UI integration example of configuring action processor parameters directly by adding the monobehavior, configuring it and run. Supports overriding action or binding processors.
• Added RebindActionParameterUIEditor which is a custom editor for the above MonoBehaviour.

Testing status & QA

Functionality has been tested during development by running the associated sample.

Overall Product Risks

Small, no changes to source, only to sample scripts.

• Complexity: Medium
• Halo Effect: Small

Comments to reviewers

I am not 100% sure the scene save doesn't contain any accidental changes but I believe it should be fine.

Checklist

Before review:

• Changelog entry added.
  • Explains the change in Changed, Fixed, Added sections.
  • For API change contains an example snippet and/or migration example.
  • JIRA ticket linked, example (case %%). If it is a private issue, just add the case ID without a link.
  • Jira port for the next release set as "Resolved".
• Tests added/changed, if applicable.
  • Functional tests Area_CanDoX, Area_CanDoX_EvenIfYIsTheCase, Area_WhenIDoX_AndYHappens_ThisIsTheResult.
  • Performance tests.
  • Integration tests.
• Docs for new/changed API's.
  • Xmldoc cross references are set correctly.
  • Added explanation how the API works.
  • Usage code examples added.
  • The manual is updated, if needed.

During merge:

• Commit message for squash-merge is prefixed with one of the list:
  • NEW: ___.
  • FIX: ___.
  • DOCS: ___.
  • CHANGE: ___.
  • RELEASE: 1.1.0-preview.3.

After merge:

• Create forward/backward port if needed. If you are blocked from creating a forward port now please add a task to ISX-1444.