issue #5110. refactor UILoadingBar, remove unneeded deprecats
issue #5110, refactor VideoPlayer
issue #5110, rename a member variable and delete gui prefix in ui tests
issue #5110, fix VideoPlayer android compile error
issue #5110, refactor UIText
issue #5110, refactor UITextAtlas
issue #5110, refactor UITextBMFont
closed #5110, add const reference to typedef
closed #5110, add const specifier to getStringLength function
closed #5110, refactor
Merge pull request #6730 from andyque/refactor5110

refactor ui framework