The icon object is on the tool pallet. An icon is just a static image in ParaSQL, however you can place an invisible button(transparent colors) on top of the icon to give it functionality. You can also use special symbols for buttons, what I do is go to any google doc, on the insert menu, select special characters. Find a symbol you like and click it, this will write it to your doc, from there I copy it and go back into paraSQL and paste into edit label for the button.
This method may work for inserting the material fonts, I am trying to find them hosted as a font on the web to copy from. It says this line of code is needed: