[bugfix]  del pad directory
[bugfix]  del assets pad css directory
Merge remote-tracking branch 'origin/dev-2.0.0' into dev-2.0.0
[bugfix]  tab xmind
[bugfix]  mv webapp to widget
[bugfix]  add refresh test css
[bugfix]  modify setting.php
[bugfix]  mv webapp to widget for demo
[bugfix]  mv webapp to widget for js
[bugfix]  mv webapp to widget
Merge remote-tracking branch 'origin/dev-2.0.0' into dev-2.0.0