Removed menu tooltips from Surface Menu until the implementation can be improved and then added to all menus.

Updated help_resources.qrc file.  But, getting errors on image loading when viewing Help Html pages in Help Viewing.  However, the help pages and images are loading correctly.  The paths listing the errors have the images in directories different than the images are actually located.  Will see what happens with build that uses Qt 5.7.

WB-907 Free Hand Lines: Disable Cut/Copy for free-hand lines until there is time to implement pasting.   Can be reenabled in Annotation::initializeProperties().

Added a timer so that there is a one second delay before a tooltip is displayed by WuQToolTipHelper.  But before that, I have enabled Qt tooltips for the surface menu to verify that Qt's tooltips do or do not work for Mac menubar in Qt 5.7 (I have 5.14.2 on my computer).

WB-926 Long scene descriptions cutoff in scene selector: Removed some code that was used for 'before and after' testing to compare cutoff vs non-cutoff descriptions.

WB-933 Window Menu -> Identify Toolbar Information Button: Disable the toolbar's information button and the Window Menu's Information item when the Information is displayed in the Overlay Toolbox.

WB-907 Free Hand Lines: Fixed some issues with poly lines.  If user is drawing poly line in a tab space but some vertices are outside the tab, allow and successfully convert to window space.  Fixed some issues with copying and pasting.  Still need to fix paste and change space for poly line.  Also, updated tooltips for poly line drawing button in annotation mode toolbar.

Resolve WB-934 Identification symbols may be too small: At end of constructor for identification widget, update all components with the identification settings.

When drawing an annotation in tab space, the coordinates are tested to verify that they are within the tab.  If not, a dialog pops up allowing the user to convert the coordinates to window space.  This was not working for a poly line and has been fixed.

WB-931 Surface, chart, and volume coloring is incorrect when opacity is less than 1; WB-918 Transparency in capture: Defaulted separate rgb/alpha opacity to on.  It fixes both of these issues although WB-931 is known to be a problem in Qt 5.14.2 and not a problem in Qt 5.7 and 5.9.5.

QMenu::setToolTipsVisible() did not work with Qt 5.7 for Mac Menubar.  So replacing with WuQToolTipHelper that watches for the QMenu::hovered signal and displays a QToolTip.

Enabled tooltips on the Surface Menu.  The tooltips do not work with Qt 5.14.2 in the Mac Menubar so pushing this change will allow testing with 5.7.

Add experimental tooltips to the Surface Menu.  While there is a function QMenu::setToolTipsVisible(), it does not work for menus in the Mac Menu Bar.  So, WuQToolTipHelper will show a tooltip for a QMenu's QAction.

WB-907 Drawn Free Hand Lines: Add pop-up menu to poly line tool button so that user can choose to draw by dragging the mouse (line is finished when user releases mouse) or with mouse clicks (user must shift click to finish).

WB-918 Transparency channel in captures: Additional opacity functions are now enabled for separate RGB / Alpha blending using Develop Menu -> Separate RGB / Alpha Opacity.  Pixel RGBA is examined in View Mode using the pop-up menu.  The dialog shows pixel RGBA and if the format is pre-multiplied alpha, a second set of RGBA values are shown with pre-multiplication removed.

WB-900 Charting Revisions: Correct line layer normalization to apply the absolute value to the input data values (was applying absolute value result of transformed data).  Update normalization pop-up widget to show order of operations.

WB-918 Transparency channel in captures: When the Develop Menu is enabled (in Preferences: Misc tab), add "Show Pixel RGBA..." to the View Mode's pop-up (right-click) menu.  When selected, a dialog is displayed containing the RGBA values in the frame buffer for the pixel under the mouse.

WB-925 Some PNG format icon files cause warnings: The warning messages produced by Qt when reading the PNG images can be safely ignored.  So, the Qt message handler callback was moved out of desktop.cxx and into a new class WorkbenchQtMessageHandler.  This new class also includes support for suppressing messages and currently suppresses the Qt PNG ICC profile messages.  It does not look like wb_command has a Qt message handler, and WorkbenchQtMessageHandler could also be used for wb_command.