NXDRIVE-470: Fix white page in conflict window when user's firstName / lastName are None
NXDRIVE-470: Fix white page in conflict window when user's firstName / lastName are None

arameshkumar/base-nuxeo-drive,ssdi-drive/nuxeo-drive,rsoumyassdi/nuxeo-drive,ssdi-drive/nuxeo-drive,rsoumyassdi/nuxeo-drive,rsoumyassdi/nuxeo-drive,arameshkumar/nuxeo-drive,arameshkumar/base-nuxeo-drive,arameshkumar/base-nuxeo-drive,arameshkumar/nuxeo-drive,arameshkumar/nuxeo-drive,ssdi-drive/nuxeo-drive,arameshkumar/nuxeo-drive,arameshkumar/base-nuxeo-drive,rsoumyassdi/nuxeo-drive