Capture tool unable to render captured image if not calibrated

[gvincke]

When asking an image capture with the UI capture tool, a GRAILS error is generated when the image is not well calibrated (meta-data setting pixels-distance relation).

[geektortoise]

This is an IMS problem. The commit https://github.com/cytomine/Cytomine-IMS/commit/917f305b4db26c6302cf81059ed979f8a039eba3 fix the problem.