- balloon behavior:

shorten the message, set balloon zindex lower than right click menu, so
balloon will always hide behind the click menu, and update the balloon
hiding time to 3 second.

- table count number
make number smaller (automatically increased spacing between date
selector and the numbers) but seems like it's a little too dim.... so I
made it bold. see if you like it. this change also apply to table
display when date selector is not needed.