Maxthon 3.1.5.1000

# Fixes:
* Main Frame
- Auto Refresh time problem.
* Webkit
- Solved a sort of page compatibility problem.
- Fixed a sort of browser crash problem.
- “Back” button invalidation problem.
* Interface
- A display problem of Tool Bar drop-down menu.
- The focus window of Favorites folders could not disappear sometimes.
- Skin hangover problem when opened New Window.
* Side Bar
- Window panel moving problem.
- The width adjustment problem of Side Bar popup panel.
* Reader Mode
- An invalidation problem of enabling Reader Mode.
* External Tools
- Failed to use the Office software when added it into External Tools.
- Could not add 64-bit apps from System 32 folder.
- Failed to add NOD32 into External Tools.
* Others
- Fixed a connection error.