Version, changelog
Merge branch 'development' into hotfix/v2.6.1
More Circular ref fixes

[#43877869]
More circular refs

[#43877869]
Unify weak refs in *Utils

[Deliver #43877869]
Use common define for weak refs

[#43877869]
Add retina startup image
Add twitter dashboard config info to docs

[Deliver #43809645]