How to add/restore the 'Apps' shortcut to the home screen of Apex Launcher

I'm using Apex Launcher. For some reason, I don't seem to have the 'Apps' button on the home screen (i.e. the button on the bottom-right of the default Touchwiz launcher that opens the list of apps). I've tried to add it manually using QCustomShortcut but I don't know the package name. Does anyone know how to get this button back or add it manually? Or if someone knows the name of the package or process name (of the 'Apps' process), I may be able to work it out from there. This is the icon I'm referring to, as it appears in the default Touchwiz launcher: Samsung GS4 home-screen