WB-846 Change default palette to absolute percentile: While changes for palette initialization were made to PaletteFile::setDefaultPaletteColorMapping, it is never used.  VolumeFile::validateMembers() has been updated so that if a volume's map does not have palette color mapping (and is not a label volume), the default will be use to use the Absolute Percentile and the ROY_BIG-BL palette except for an ANATOMY volume with one map which will use the GRAY_INTERP_POSITIVE palette.

Add more macro support for widgets on surface properties dialog and improvements in creation and management of macro widget actions.

Added some static methods to make it easier to issue command events such as update surface coloring, update user-interface, update graphics.

Added WuQMacroWidgetAction class that allows widgets in dialogs modal and non-modal dialogs (note: widgets may not exist when macro is run) to function with the macro system.

Resolve WB-850 Data Tooltips should show top-most enabled overlay.  Data tooltips was always showing the top overlay, even if the top overlay is DISABLED.  This has been corrected to show the top-most ENABLED overlay in the tooltip.

Remove fixes for  'initializer list' compilation warnings seen on Mac build as it causes a compiler error on Linux systems.  It appears that this warning on Mac may be invalid (see https://stackoverflow.com/questions/13905200/is-it-wise-to-ignore-gcc-clangs-wmissing-braces-warning).

WB-842 Opening a spec or scene file from Finder on MacOS Mojave (10.14) does not work: This works by the MacApplication class receiving a QFileOpenEvent and then passing it along through the Workbench event system to GuiManager.  It seems that in MacOS Mojave, this is happening very quickly, before GuiManager is created.  So, move the creation of GuiManager to just after the creation MacApplication.

Resolve WB-846 Change default palette to absolute percentile: absolute percentile is now the default palette for all data except data interpreted as anatomical volume data that remains percentile.

Resolve WB-847 Disable normal test for surface drawing: Culling of back-facing triangles has been disabled when drawing a surface.

Added a method to GraphicsPrimitive that simplifies a line by removing every "n-th" vertex but does not improve performance much and lines look different.  May try to improve it later.

The text "Scenes..." was missing on the Window Menu (item was blank).  Cleaned up a a toolbar button tooltips.

When a scene is reloaded through the Macro Dialog, restore the expanded status of the macro and selection of the macro or the command.

Improve warning message for invalid macro command data type and include command name when number of parameters is incorrect.

Volume Surface Outline Drawing: Added cached volume surface outline drawing for oblique volume slice drawing.

Removed DeveloperFlags related to Scene File (for addition of macros) and related testing as new Stream Reader and Writer for Scene File is functioning correctly.

Volume Surface Outline Drawing: Invalidate cached outlines if the underlay volume changes.  For the "scaled coordinate" in the cache, account for the voxel size to prevent adjacent slices from using the same cached outline.

MacOS Only: Added an option to wb_view "-mac-menu-duplicate".  This is an experimental option and creates a menu bar at the top of first created window that duplicates the content of the menu bar that appears at the top of the display (similar to menu bar on Linux and Windows versions of wb_view).  All menu items function except for menus whose content are determined at the time the menu is displayed (such as the list of recent scene files).  This options may be useful when creating images for tutorials so that the menu bar is similar to Linux and Windows and make it easier to include the menu in the image without have to capture the menu bar at the top of the window.

Fixed handling of keyEvent.  If a KeyEvent is received, and the processing for the event (such as running a macro) calls QApplication::processEvents(), ::keyEvent() may be called AGAIN from QApplication::processEvents() before the original KeyEvent's processing has completed.  So, when a KeyEvent is received, ignore any other KeyEvents until the original one has completed.

Macro Add New Command Dialog: Description of new command was not updating when the command selection was changed using an arrow key.

 Volume Surface Outline Drawing: Fixed bug in cached volume surface outline key's 'less than' method and use rounding when converting the cached sliced coordinate to a scaled integer.

Volume Surface Outline Drawing:  Implemented caching of the surface outlines for orthogonal slice drawing.  In an instance with A, C, and P slices with four contours, drawing time is reduced from 0.064 seconds to 0.018 seconds.  An item on the Develop Menu, "New (faster) Volume Surface Outline" allows toggling between this new cached and the old, uncached volume slice drawing for timing comparison.

Macros dialog: More improvements including using only a horizontal scrollbar for the bottom part of the dialog containing information about selected macro or command.

Macros: Fix bug that improperly limited range of float/integer parameters in macro commands on macros dialog.

Macros Dialog: Implement Matt's suggestion for Macros Dialog.   Removed 'splitter' between macro/command selection and macro/command editing widgets.  Let selection widget expand to fill any extra vertical space.

Macros Dialog: correct and improve some layout issues including excessive space between command parameters when height of dialog was increased.

Macros Dialog: Add to command right-click menu: (1) Run this Command; (2) Run and Start with this Command; (3) Run and Start with this Command No Delays/Durations

Macros Dialog: After reload scene button is used,  update dialog contents to possibly a fix reported on Linux but not observed on the Linux build system computer.

Macros Dialog: While recording a new macro or new commands, enable the STOP button to allow the user to stop recording (same function as pressing Record to turn off recording).

Fixed bug in macro editing.  If a macro contained an overlay (file and map), changing the file did not update the name of the selected map.  Selected map needs to change if the map name from the old file is not in the new file.