Update 6.4.2

UI
* Show player's name in Lobby
* Supported Advanced Search in Song Selection
Play
* About 2x faster in keysound chart loading
Editor
* Supported to modify some basic parameters for defualt modules in Composer
* Supported new TouchArea module in Composer
* Supported to modify exists Scene & Trigger in Composer
* Fix the bug in the Editor where the Hold length can still be modified when selecting the Select tool
* Added Game:WriteFile,Game:WriteFileChart APIs for skin lua
Other
* Supported to set Mouse Left Button as shortcut