ToolbarItems API in JavaScript Chart API control

Defines the zooming toolkit. They are:

• Zoom - Renders the zoom button.
• ZoomIn - Renders the zoomIn button.
• ZoomOut - Renders the zoomOut button.
• Pan - Renders the pan button.
• Reset - Renders the reset button.
• Zoom
• ZoomIn
• ZoomOut
• Pan
• Reset