Starting on WB-393 Volume ROI Drawing.  Toolbar has been created and dialog for creating a volume file is functioning.
Fixed bug in culled orthogonal volume slice drawing that caused the selection to be off by a slice which sometimes caused the slice in the viewed axis to change.  Also added selection for volume voxel editing.
Continuing to work on WB-393 Volume ROI Drawing.
Continuing WB-393 Volume ROI Drawing: Added an undo system and use it in the volume file editor
Continuing WB-393 Volume ROI Drawing: Most of implementation is written but has not been tested.
Fixed bug: If the volume underlay (anatomical volume) is turned off in the overlay toolbox, the selected slices do not change and then clicking the up or down arrow for a slice coord or index causes slices to jump to a much different location.
Removed class GuiQt/LabelTableEditorDialog as it had no implementation and was not used.
Fixed crash in overlay system when a chart is displayed in a tab.  The bug occurred during a recent update to yoke to the file selection status.
More chnages for WB-393 Volume ROI Drawing
the CaretAssertToDo was not removed when compiling optimized.
When assigning label coloring, if the label is not in the files 'group/name' hierarchy, go ahead and assign the label's color.
Additional updates for assigning volume label voxels and creation of new labels.
More updates for volume editing including improved error messages and clean up of comments and code.