Maxthon 3.3.4.3000

# Improvements:
* Extension Platform.
* Decreased the memory usage.
* Improved the support to the search attributes of htlm5 search box.
# Fixes:
* Main Frame
- Secure URL icon in Address Bar could not be hidden.
- It opened new tabs when pressed F1~F12 keys instead of working on current blank tabs.
- It would refresh the current tab when right-click to refresh the background tabs.
- There would be messy code when "Translate Selected Context".
* Webkit Core
- Some crash problems.
- One memory leak problem.
- Fixed the display problems of Developer Tools.
- Freeze problem when refresh the any
- Page display problem of Carrefour site.
- Night Mode could not work well for all tabs.
* Extension Platform
- Some interface realization problem.