comments implementation.
comments api
show comments
comments gui

still need icons
adjust comment width
open websettings use token object
unlock before emit signal avoid dead lock.
bug fix: save note from noteview instead of web editor
remove cloudPool and use async api
download notes use global token object
remove hard-coded sync url
upload avatar use global token
fix token dead lock issue and use unique connection
add close button to move note and preference dialog
add drop image to note view support
use global token object for syncing process
login use global token object
move global GetTempPath to PathResolve class
resolve class name
unified better logger facility