Don't add margin-bottom to FieldLayout in a HorizontalLayout
Don't add margin-bottom to FieldLayout in a HorizontalLayout

That doesn't make sense and looks strange. Each field would be differentiated
with some space to the other. A HorizontalLayout is meant to show all items
in one line, and it should be possible to add fields (a combination of an input,
e.g., and a label).

Change-Id: Ife3248c70c70655d0b81ac6a21d095dd0db20e37

wikimedia/oojs-ui,wikimedia/oojs-ui,wikimedia/oojs-ui,wikimedia/oojs-ui