The prototype is linked to the PIM chart

[nathanielw]

Narrative:
As a user
I want to be able to convert the prototype I create in the PIM builder to a chart in the chart editor
So that I can see a different representation of the prototype and perform further actions on the chart.

Acceptance Criteria:

Scenario 1: Button exists
Given the prototyping module is visible
Then a button exists for converting the prototype to a chart

Scenario 2: Converting a chart safely
Given the prototyping module is visible
When the Convert button is clicked
Then the user is informed that the existing chart will be lost.

Scenario 3: Converting a chart
Given the prototyping module is visible
When the Convert button is clicked
And the user chooses to convert the prototype
Then the chart editor should display a chart
And the chart should have a state for each screen of the prototype