add test frame to UIScene_Editor
add switch loading method to buttonTest
add switch method to checkBoxTest
add switch method to UILayout and UIIamgeView
add switch method to LoadingBar, ListView , pageView and scrollView
add switch method to all the GUI tests
issue #4689: support external key.
Replace log with CCLOG
fix widget ignoreContentSize issue
fix TextReader TTF font Reader issue
add UIPageView button tests
add nested layout
Merge pull request #7327 from andyque/addUITests

fix some minor bugs of ui
Merge pull request #7326 from Dhilan007/v3-gc-refactor

issue #4689: support external key.
[ci skip: update version]
roll back initWithImage logic
1.fixed lose disconnected event.
2.fixed incorrect device name and device id;
Merge pull request #7328 from dabingnn/v3_rollBackTexture

roll back initWithImage logic
update test case
update API annotation.