When unconfigured platform is selected, dynamically add install page as next page

If user selects an unconfigured platform, disable "Finish" and enable "Next". Make next page be the install wizard page. Filter that page down to only the selected platform.

When user finishes wizard we'll install the unconfigured platform first, then create project. If a platform fails to install we'll need to prompt if it's OK to create project with that platform and let them know how to install it later through tiapp editor?