instead of using a table for "document contents" use a series of three nested divs

the innermost divs have class itemCategoryIcon:
  - have height and width set (just as before)
  - have display set to inline-block

the parent div is surrounding each icon block is documentContentsItem
  - it's diplay property is set to inline

there's a documentContentsItem div surround the whole list of items, but it doesn't have any styles currently applied.
added global parameter "displayConstraints" that defaults to true for allowing user to turn off the display of "cbox properties display style" constraints (e.g. properties on these elements beside xsi:type, id, idref)