We populate the page with images presented in different box-wrappings.
Image1 and Image2 is normal itemBoxes,
with normal header and with/without toggler.
Image3 and Image4 is image itemBoxes,
Image3 has "no-header" and Image4 has "dynamic-header" in classlist
and are draggable by content
Image5 and Image6 is itemBoxes,
with a special stylesheet
"style-imagebox" in class list
Image 5 has "dynamic-header" in class list
and Image 6 has "no-header" in class list.