Add the ability to not display an Item's label in the UI
There are cases where the item's label is redundant and should not be displayed. Currently you can set it to a " " but the Qt Elements that make up the label as still created and can take up space. What is needed is to not display the Qt Elements at all if the label is set to " " and if the item is not optional (the optional checkbox is also one of those label related Qt Elements). Currently the ParaView related qtItems do this but this should be extended to all qtItems.
Edited by John Tourtellott