don't have to set _orderOfArrival to 0 after visit
Simplify BlendFunc operator< judgement
Modify BlendFunc operator< judgement
Add getStringLength() support for UITextField
Add shadow, outline, glow filter support for UITextField
Merge pull request #6938 from CaryZheng/v3

Simplify BlendFunc operator< judgement
fixed WP8 project:compile error,missing files,wrong file path.
Merge pull request #6990 from Dhilan007/v3-wp8fix

fixed WP8 project:compile error,missing files,wrong file path.
refactor UIButton setColor & setOpacity
refactor UICheckBox setColor & setOpacity
refactor ImageView setColor & setOpacity
refactor LoadingBar setColor & setOpacity
refactor Slider setColor & setOpacity
refactor Text setColor & setOpacity
refactor TextAtlas setColor & setOpacity
refactor TextBMFont setColor & setOpacity
refactor TextField setColor & setOpacity
refactor Widget setColor & setOpacity
refactor Scale9Sprite setColor & setOpacity
Remove unnecessary Type::TTF Check

Remove unnecessary TTF type check on enableOutline or enableGlow function。