* rewrite notice module
* optimization: show some notification when export html or pdf
* optimization: style of open project button
* little bug fix
* style: uniform titlebar hight to remove some style error
* side-bar-view
* list files view
* update the structure of store, add modules
* open project and change select files
* add tabs view
* listen for file/dir changing, and update in sidebar
* delete some unused code
* context menu in sidebar
* add tool bar and tab bar menu item
* save all and save all and close
* copy, cut, paste, new file, new directory, move to trash, open in folder
* rename in sidebar
