let WEditor decide component use for display value in gridView

let WEditor decide control for display field in gridView

this change support ticket IDEMPIERE-2310. now, in gridView component for display Gfield always is label and create at GridTabRowRenderer.
it's better when class extend of WEditor can override this behavior

some other things also should let class extend of WEditor ability override
example:
GridTabRowRenderer.getDisplayText
GridTabRowRenderer.getDisplayComponent
back update display component in GridTabRowRenderer.stopEditing