no issue
Because the signup form is responsive, it is displayed too small in the preview. To counteract this, the width of the iframe is increased to 200%, and clipped to make it larger.
fixes https://github.com/TryGhost/Team/issues/3296
Adds a new `signupForm` feature flag, that will enable/disable the new embeddable signup form code generation.
Since the new flag shares its name with a new config value (that contains the script location), this also fixes the feature helper to only use a config with the same name if it is a boolean.