I accidentally removed the system tray part of the top panel, where all the icons for the active programs are (eg. messenger, music player, uTorrent and so forth). It seems like they're just outside of the screen on the left side as the messenger notifications appear from that side, but I even don't have a panel there. I know it sounds like a stupid question, but I'm newbie at Linux and I really need the tray in order to access some of the stuff. Please help! Thanks.