Align form builder home screen with the prototype

[danielburnley]

Trello card: https://trello.com/c/2mA8sYr5/262-create-form-builder-home-screen

Prototype screen: https://forms-prototypes.london.cloudapps.digital/form-designer/form-home

To do:

• Update form home screen create button to match the prototype
• Update form list display to match the prototype
  • Note: In Dev we can keep the link to the runner for now as a link underneath the form name or something similar
• Edit links take you to the form overview screen (depends on Create initial form overview screen #43 )
• Create request and frontend specs for this