Fix various little bugs preventing the insertion of a MINC file without DICOMs#1289

cmadjar merged 2 commits intoaces:mainaces/Loris-MRI:mainfrom

cmadjar:fix_minc_insertion_to_work_when_no_DICOMs_providedcmadjar/Loris-MRI:fix_minc_insertion_to_work_when_no_DICOMs_providedCopy head branch name to clipboard