Maxthon Cloud Browser 4.1.0.600 Beta

# New Features:
* GPU Acceleration in Ultra Mode
* URL ad blocking in Retro Mode
* Popup Blocker in Retro Mode
* Page Mute
# Improvements:
* Improved the loading speed of Quick Access page
* Optimized the display method of tab list
* Enhanced the Cookie privacy policy
# Fixes:
* Main Frame
- Problem caused by skins
- Problem caused by adding favorites
- It could not use right-click menu in Download Manager
- Problem about Lock Tab
- Language switching did not work in Download Manager interface
- Syncing feature did not work after switching account
* Webkit Core
- Page kept refreshing when right-click menu popuped
- Developer Tools window problem
- Developer Tools right-click menu problem
- It could not upload files to Google Cloud
- No respond of some pages
- Youtube page display problem
- No respond of the browser if popuped video window
- Attachments in some mail boxes could not be downloaded by third-party tools
- Proxy problem
- Print feature did not work in some pages
- Improved the core stability
* Maxthon Cloud
- Optimized local file cloud push