[Draft] Create a funnel using via the UI
Problem
We're able to render visualizations for funnels, and following the completion of Funnel analysis visualization MVC (&9016), we'll have a schema-driven approach to creating funnels.
However, our existing visualization designer does not support an advanced workflow for building funnels within the GitLab UI.
Proposed solution
Design a UI workflow that allows for the creation of a funnel, outputting a YAML schema that will ultimately render a visualization of the said funnel.
User experience
Users should be able to select pages and order for a flow, add additional filters and choose a bar chart or funnel visualization in the Visualization Designer.
Users should be able to re-arrange those pages, add/remove filters and change visualization within the designer.
Edited by Dennis Tang