Merge branch 'v3' of https://github.com/cocos2d/cocos2d-x into v3-labeljags
Merge branch 'v3' of https://github.com/cocos2d/cocos2d-x into v3-labeljags
Merge pull request #8857 from zhongfq/patch-2

fix memory leak when add listener to ui object
Merge branch 'v3' of https://github.com/cocos2d/cocos2d-x into v3-labeljags
Rolling back text color of system font on Linux
Merge pull request #8884 from Dhilan007/v3-labelfix

Rolling back text color of system font on Linux