I am using the Mate Desktop Environment v-1.4.1 and having a Mate-Menu applet in the bottom panel: Shutdown [ICON] Applications Places System. See screenshot below.

Is there any way to change or remove the [ICON] on the left of the Applications menu?
Where does Mate take this from? I noticed the inon changes when using different icon-themes but I don't understand how to customize only this single icon.
