ROI tool: Create draw mode group box
ROI tool: Create draw mode group box

Visually groups the draw modes, and prevents the brush size adjust button from getting too small.

MRtrix3/mrtrix3,MRtrix3/mrtrix3,MRtrix3/mrtrix3,MRtrix3/mrtrix3,MRtrix3/mrtrix3,MRtrix3/mrtrix3