Use an uitoolbar and ui*tools to build the default figure toolbar (bug #55795) * Figure.[cc,h] (mouse_mode_to_string, mouse_mode_from_string): Remove functions. (createFigureToolBarAndMenuBar, updateFigureToolBarAndMenuBar): Remove methods. (Figure::Figure): Instantiate the menubar here. Simplify size handling now that the toolbar is created in addCustomToolBar. (Figure::addCustomToolBar): Add optional argument to signal if the toolbar is the default one. (Figure::autoAxes, Figrue::toggleGrid, Figure::toggleAxes): Remove methods. * GLCanvas.[cc,h] (GLCanvas::autoAxes, GLCanvas::toggleGrid, GLCanvas::toggleAxes): Ditto. * Canvas.[cc,h] (Canvas::canvasAutoAxes, Canvas::canvasToggleGrid, Canvas::canvasToggleAxes): Ditto. (Canvas::setCursor): Use resourse_manager to retrieve icons. * MouseModeActionGroup.[cc, h]: Remove unnecessary class file. * __add_default_menu__.m: Add default toobar and associated buttons. * libgui/graphics/qthandles.qrc: Remove file * libgui/graphics/images: Remove directory. * libgui/graphics/module.mk: Update to eliminate the Crystal icons resources. * libgui/src/resources.qrc: Include new figure-* png icons * libgui/src/module.mk: Include new figure-* png icons * libgui/src/icons/icons_license: Document the origin of figure-* icons

--- a/libinterp/corefcn/graphics.in.h	Thu Mar 07 15:11:17 2019 -0800
+++ b/libinterp/corefcn/graphics.in.h	Thu Mar 07 22:53:33 2019 +0100
@@ -5984,6 +5984,7 @@
       string_property tooltipstring , ""
 
       // Octave-specific properties
+      string_property __named_icon__ , ""
       any_property __object__ h , Matrix ()
     END_PROPERTIES
 
@@ -6047,6 +6048,7 @@
       string_property tooltipstring , ""
 
       // Octave-specific properties
+      string_property __named_icon__ , ""
       any_property __object__ h , Matrix ()
     END_PROPERTIES