refs
- dropped the portal service in favour of using the existing `membersUtils` service
- renamed `getPreviewUrl()` to `getPortalPreviewUrl()`
- update the iframe src to point to the portal preview url when on the pricing step
- added free/monthly/yearly checkboxes to pricing step
- update iframe src with regenerated portal preview params when making changes
refs https://github.com/TryGhost/Team/issues/450
Initial prototype of new launch-site wizard, meant to speed up the setup of a members site with the following steps:
1. Customise design
2. Connect Stripe
3. Set subscription pricing
- added wizard link to dashboard screen
- added `/launch/*` screens representing the wizard steps
- duplicated and refactored relevant general and members setting code and templates into each step
refs https://github.com/TryGhost/Team/issues/450
- duplicated and refactored/updated members pricing settings UI from labs to the "set pricing" step of the launch site wizard
refs https://github.com/TryGhost/Team/issues/450
- adds `launch/*` routes corresponding to launch wizard steps
- sets up navigation between each wizard step
- adds components for each `launch/*` step to contain step-related functionality and facilitate later refactoring to a generalised wizard component
- adds link to the launch wizard from the dashboard screen
