Release v8.2.23.

[na9da]

Release ticket - #6643

This release has changes from the following PRs:

• Only add groups to CatalogIndex if they aren't empty #6632
• Modify GltfMixin to use stable instances of Cesium DataSource and Entity #6638
• Fixes a timing bug in Cesium map which resulted in some DataSources not getting completely removed. #6639
• BoxDrawing improvements. #6644
• Add ActionBar. #6645
• Adds an API to extend workbench item controls from plugins. #6647
• Add MapToolbar.addToolButton() API. #6646
• Add UploadDataTypes api #6652
• Add FeatureInfoPanel API. #6651
• Change SelectableDimensionButton styling #6657
• Refactor Cesium3dTilesMixin. #6654
• add media query for mobile size and fit content #6661
• 6503 upload terria web data #6664
• Extend responseDataPath to support extracting objects inside arrays. #6670

What this PR does

Bumps terriajs version to 8.2.23

Testing

For some reason CI doesn't like the underscore in the branch name, so the deployment is not loading. I have pushed the same branch under a different name for testing - http://ci.terria.io/rel-8223/

Checklist

• There are unit tests to verify my changes are correct or unit tests aren't applicable (if so, write quick reason why unit tests don't exist)
• I've updated relevant documentation in doc/.
• I've updated CHANGES.md with what I changed.
• I've provided instructions in the PR description on how to test this PR.

[staffordsmith83]

Looks fine to me