New volume slice drawing is working but need to make GUI changes to test some of the new drawing functions.
Revisions made to GUI to remove oblique/orthogonal/montage tool buttons from Toolbar:Slice Plane.  Add orthogonal/oblique selection to Toolbar:Slice Indices Coords since it is available for both Volume Slice View and All Structures View.  Add 'On' toolbutton to Toolbar:Montage for enablign montage volume slice view.
Removed usage of VolumeSliceViewModeEnum and now using new drawing that includes oblique montage.  Old volume drawing is still in code but needs a flag changed to be used.
Add a public method to get the string value of an enumerated type so that obsolete (and removed) enumerated types can be handled in scnees.
Fixed loading of scenes created prior to revised volume viewing GUI changes including allowing oblique montage.
Reduce excessive space around Toolbars: Chart Type, Clipping, Slice Selection, and Volume Montage sections.
WB-413: Activate Volume ID by Default: Remove 'Volume ID' from Identification Dialog.  Add 'ID' to Volume Slice Indices in Toolbar.  When this control is selected, an identification operation will change the selected volume slices.
Fixed crash caused by a dynamic_cast error that occurred with using gcc-4.9.  Replace dynamic_cast with qobject_cast.  Message included 'has_unambiguous_public_base dynamic_cast'.
Changed Toolbar:Clipping 'Setup' button from a pushbutton to a toolbutton.
Moved Toolbar:Montage so that it is adjacent to Toolbar:Slice Plane
Replaced Toolbar:Window with Toolbar:Tab and moved it into its own class.
Moved 'ID' from Toolbar:Slice Indices/Coords to Toolbar:Tab 'Volume ID'.
Resolve WB-419: Labels with Outlines.  Added a thired label drawing type 'Filled with Outline' to the existing 'Filled' and 'Outline'.  Also added an Outline Color for labels so that the outline color may be different than the label color.  The outline colors use the 'CaretColorEnum' which also used elsewhere in Workbench.