That's what it looks like in my app tray. I want to be able edit the apps that show up when I click the little carrot icon in the middle of the bottom bar.
The reason being that the apps in that try task manager, calendar, world clock... Their not the full apps. Their "mini" apps... Kind of like special widgets that work with the full apps.
As a matter of fact all of the mini apps (except task manager and calculator) have a little arrow on the left hand upper corner that takes you to the full app it coincides with.
I would think somebody would have to do some fancy coding and write some more mini apps to put in there.
Sent from my Galaxy10.1 TouchWiz/ADWex equipped Starship.