As an user of the newly defined function editor, I would like to navigate through the function editing steps using the heading provided:

Acceptance criteria:

• Create a component that will render the editor Heading
• Render the 3 steps required for a function
• Allow the component to accept an obejct with friendly name, programmatic name (used in routing) and enable/disable state and if it is completed.
• Allow the links to be clicked if not disabled, and emit a "click" event.
• If a step is completed, show the "Black filled" state
• If a step is disabled, show the "greyed out" state
• If a step is the current one, show the "blue" state