update for lay out
update for lay out samples
reset widget chaned
reset unused format changed
update for widget percent position and size logic
update object reader for new lay out system
update lay out reader and samples
remote unuseful format
update for code format
Merge branch 'UILayout' into UILayout_Widget
Merge branch 'UILayout_Widget' into UILayout_Reader
Merge branch 'v3' of https://github.com/cocos2d/cocos2d-x into Layout
update for code format
remove unused code
update for code format
update ui widget function format
Director supports setting clear color
Merge pull request #9591 from liamcindy/Layout

update for lay out
update release note
Update RELEASE_NOTES.md