[Pro Sites] Hooks, filters, short codes/mobile styling

1. I would really like to be able to better customize the screen after a sale is completed. On-boarding after a sale has been completed is critical to ensuring a user maintains their subscription. However right now, the ability to control it through non-invasive means is difficult. Right now I modify pro-sites itself.

2. Mobile stying methods for pricing tables and everything else should be reviewed.

Thanks!