Createtool with external containers
It is possible to add tool buttons not only to the widget area but also to surrounding HTML elements, using
the toolbar modifier of the createtool function. To achieve consistent styling,
the resulting container should have the CindyJS-toolbar CSS class, as seen above the widget in
this example. Otherwise default button styling will be used, as seen below the widget.
If a statusbar property is given to the CindyJS invocation, it will be used to
identify a HTML element which will display messages about the expected next step for using the current tool.
