Graphic: Made colour choices mutable to derived classes
IconLoader: Removed not-very-subtle error message
Added IconEnum class
IconLoader: Now uses IconEnum
EditorToolbar: Now uses IconEnum
EditorMenuBar: Added icons.
The look and feel is wrong though.  The icons are indented for no
reason.  Look at a native menu for comparison.
ToolContextual: Added selectAll(), selectNone(), selectInvert()
HelpFrame: Fixed overlooked outdated method call
Commented out invalid code
Selection: Added setPivot()
EditorPanel: Removed debug-draw and trace drawing methods
Added GraphicTrace class
ContextMenu: Changed constructor
Merge branch 'EditorPanelDev'