default item is used as base class for all "normal style" efl items.
A "normal style" efl item does have a text,content & extra part.
- The text part is usally used to express some text in the item
- Content part is the *main* content part where the user attention is
- Extra can be used to display some elements that are not directly
getting the attention of the user, it can be seen as something more than
the decoration item field.