Several layout changes
- the info label is not shown anymore
- the parameters entry gui is more packed
- no more abort button

The vertical layout still needs work though
Ugly hack to align parameters to the lower bottom half, plus a bug fix for when
the messages from the workflow were displayed on top of the parameters
Yet Another Ugly Hack to get the documentation take the whole screen, in case
the user manages to get it displayed (which should be impossible)
Yet another hack (yep) to put some space between the parameters and the
continue button
Merge remote branch 'remotes/origin/workflow_gui'