New feat item desc and image support

[Max87ZA]

Added ability to add item description by specifying desc property in item added image support, instead of label(item.type = "image") Example: backgroundColor: '#000000', focusedColor: '#3d9970', image:"/images/addButton/newMeet3.png", imageWidth:30, imageHeight:30, desc:{ title: "Nové stretnutie" }