Roi lsm

Allow user to view ROI generated by 3rd party
Problem noticed while investigating https://www.openmicroscopy.org/qa2/qa/feedback/10343/

To test the PR:
 * Download the zip from QA 10343 or 10344
 * Import sone of  ```.lsm``` NOT the ```.mdb``
 * If roi count > 0. Open the image in main viewer and launch the measurement tool
 * Check that the ROIs are displayed. They do not have a z nor t.