Revert only showing elements with content in them, Fixes #757

43c12d237e attempted to only show elements when there was content in them,
which broke the UI in several other interesting ways.

Instead we will handle this in CSS with :empty, which is why all error
elements have carefully had spaces removed from them.
Merge pull request #760 from maurizi/fix/757/inlineEditHideShow

Revert only showing elements with content in them, Fixes #757