Added Ping Notification if Ping goes too high

Added Ping Notification if Ping goes too high
Added sleep timer when balloon is clicked

Made styling changes so that the bubble only shows High Ping!: __ms.
Also made notifications sleep/not show for 300 seconds if the bubble is
clicked. If the bubble is not clicked, it will keep showing high ping!
ms until the ping drops back down to low.
Merge pull request #29 from phibangbui/Vince

Added Ping Notification if Ping goes too high