Fixed flashing of graphics on Mac when in Annotate Mode, noticed mostly with viewing of a line chart.

The datatype was incorrect (integer) for the volume surface outline thicknesses (obsolete pixel and new millimeters).  This has been corrected to float and fixes an issues with the outlines being "too thin" as part of WB-723 volume surface outline should scale with viewport height.

Re-resolve WB-671 Smooth Histogram Envelopes: Envelope has been smoothed in the Map Settings Dialog's histogram.

Update for WB-633: Improved ToolTip for "Layer" checkbox on Overlay ToolBox --> Connectivity Tab.  Also added tooltip to the corresponding default on Preferences.

Resolve WB-733, Border draw mode sphere size modification: When drawing a new border, the spheres are now 3% of the maximum dimension of the surface.  For a human, this is about 5mm.  This should make the spheres a reasonable size for not just humans, but other species as well.

Some code with array initializer lists as parameters has been changed to create the array before the function call so that it will compile on Windows.

When the colorbar's Numeric Format is Auto, the number of digits right of the decimal in color bar numbers is determined by an algorithm.  In some instances, ALL of the numbers will have only zeros to the right of the decimal point (numbers are integers).  In these instances, remove the decimal point and zeros right of the decimal point (Show "-1  0  4" instead of "-1.0  0  4.0").

Resolve WB-764 Selection in tab but not aspect ratio tab: If a selection (mouse click) is not within a tab (due to lock aspect ratio), then use the window's viewport for selection.

Updates for content of windows/tabs/viewports that will be used to fix WB-764 Selection in Tab but not aspect ratio Tab and probably for other Jira issues for window margins, tab margins, and titles

Fixed crash in conversion of lines to polygonal lines.  The last point in a border failed to project which caused an out of bounds index.

Log a message if an instance of EventListenerInterface is destroyed but has not removed all of its listeners.

Add methods for drawing many spheres or squares in the same color since more efficient than drawing spheres/squares one at a time.

Renamed some enums internal to GraphicsPrimitive to better names and added a enum for the vertex color type.

Multisampling was recently enable in OpenGL for anti-aliasing of lines and polygons.  Multisampling is now disabled during selection (identification) modes to fix surface vertex identification.  Identification is performed by drawing each vertex with its identification in an RGB color and multisampling will alter the colors which prevents proper selection.

After pulling latest source, still having issues due to previous capitalization issue with OffScreenOpenGLRenderer h/cxx.  Hopefully now resolved.

Thickness of volume surface outline is now in millimeters.  If an older scene is loaded that contains volume surface outline thickness in pixels, the pixel size is converted to millimeters using the viewport pixel and millimeter dimensions the first time the volume surface outline is drawn.

In Scene Preview Dialog, the image was cropped for some scenes.  Always enabling scrollbars for the dialog allows display of entire image without any cropping.

When colorbar display mode is Percentile, do not override numeric formatting.  Until now, the numeric formatting was set overridden with decimal mode which resulted in it using the Dec/Sci Decimals setting even though it is disabled in Auto formatting mode. This fixes a problem with percentile having incorrect number of digits right of decimal.

Do not attempt to draw a primitive if it contains zero vertices to fix "Primitive not valid" error message.  This may occur when trying to draw a border for a non-matching structure.

Fixed new Off Screen Image Capture when used for Scene Preview image.  Image size was zero causing the failure.

Restoring a line-series history item (line chart) incorrectly set the primitive type to an OpenGL line type instead of a polygonal-line-type.  As a result, there were gaps at the junctions of the connected line segments.

Improve polygonal lines to mostly eliminate overlapping drawing when lines are very thick.  As lines are converted to polygons, add the join triangle instead of adding the join triangles after all poly-lines have been created.

Rename 'thickness' attributes of volume surface outline to 'thickness pixels obsolete' since it will soon be replaced with millimeters or percentage of viewport height.

One gap still remained in a surface contour where the first and last points connected.  This has been fixed in the lines to polygon conversion by appending the points with the first two points.  The first two points are needed for the join logic to fill the gap.

Small gaps noticed with volume surface outline were fixed by a previous commit that fixed 2D triangle area calculation and using zero for left/right turn calculation for line segments.

Corrected MathFunctions::triangleSignedArea2D: Calculation were in float and the result was incorrect when an edge of the triangle was very, very small.  Calculations are now performed in double-precision and area calculation is now correct.

Added new volume slice surface outline drawing to Oblique Volume Drawing.  Also verified that new volume surface outline functions on a surface with an open topology.

Adding OffScreenOpenGLRenderer.cxx back into GIT with correct capitalization (see previous commit 391b67102e21481e8490d821d883a0d6cb0734b5).

Had capitalization wrong on OffScreenRenderer.cxx (4th character 'S' as both lower and upper case) so it got added twice (Mac is case insensitive).  So moved the file, deleting it from GIT with this command and then adding file back to GIT in next commit (if it works).

Initial implementation of new algorithm for drawing volume surface outlines using polygons to avoid limits on OpenGL line width.  Width of volume surface outline has been changed to a percentage of the viewport height.