LayerControl dialog: updated behavior so that the Name editing requires Doubleclick, while "ROI advance to midslice" requires "Ctrl+Doubleclick".

FireVoxel Build 207 is released.

1. Dialog Layer Control: When there is a ROI layer present - user may doubleclick on the layer name.  Current Z-slice of the entity would be changed to the mid-Z slice of that entire ROI (at that current timepoint in case of 4D ROI).
2. 3D Paintbrush:  enabled the drawing with the Radius=0
3. Use Interface options dialog:  removed the "Synchronized cursor" option.
4. Dynamic Modelling:  Input Function correlation model:  fixed the bug and checked the correctness on the identity problem.