example DepthProbe.py: problem with aspect ratio / color bar

Image is plotted with impossible aspect ratio. Problem disapperas if no color bar is plotted.

added bug label

assigned to @j.wuttke

mentioned in commit 4e0947ac

mentioned in merge request !1230 (merged)

mentioned in commit a304f77d

closed with merge request !1230 (merged)

closed with commit 4e0947ac