Planar figures not rendered if Measurement toolbox is not opened
The mappers for the planar figure classes are loaded by the activator of the 'org.mitk.planarfigure' plugin. If this plugin is not loaded, the planar figures will not be rendered. The Measurement view is defined by the 'org.mitk.gui.qt.measurementtoolbox' plugin that depends on 'org.mitk.planarfigure'. That means, if you open the Measurements view, the planar figure plugin will be loaded and the mappers will be registered. But if you do not open the Measurements view, the mappers will not be registered and the planar figures remain hidden.
The solution could be to define the planar figure plugin a dependency of our 'commonapps' plugin, so that it is loaded in every application.