If you like this enhancement, please email the pronto team and tell em so because, IMHO, this is a huge timesaver. One other thing that you will notice is that when you copy icons from one button to another, the Font Size (If symbols are used, and new font does not support symbols, font is not copied) and Colors are also copied. This was an enhancement that several of us requested.

If a button does not have images, don't sweat it cause the fonts and colors are also copied.