fix(sign_up): Ensure `beforeRender` calls FormView's `beforeRender` (#5284) r=vladikoff
fix(sign_up): Ensure `beforeRender` calls FormView's `beforeRender` (#5284) r=vladikoff


mozilla/fxa-content-server,shane-tomlinson/fxa-content-server,mozilla/fxa-content-server,shane-tomlinson/fxa-content-server,mozilla/fxa-content-server,shane-tomlinson/fxa-content-server