Enable chart "Save as... JPEG"
Bugfix: 'Closed' measurement tool reopens on FigureEvents
Fixed: Unit was not taken into account when calculating distances
Overhauled export action to match other MeasurementViewerActions
Just fixed comment
Reverted commit 72bce453b93
Merge pull request #3084 from dominikl/more_roi_fixes

ROI/measurement tool fixes