Recipes that need config do not have config screen activated when max_selections > 1 and more than one selection is chosen

Problem/Motivation

Recipes are able to prompt the user for input in the UI when they are applied. However, when a user adds more than one recipe to their selections and tries to apply multiple at once, the config screen isn't activated.

Steps to reproduce

Download the Analytics recipe from Drupal CMS into a base install of Project Browser (doing this ensures max_selections is NULL, allowing the "cart" UI for installing/enabling multiple projects at once).

Add the Analytics recipe and one other recipe into your selections, then install your selections.

Proposed resolution

For as many recipes as have config screens, the user should be walked through each screen, regardless of what they've selected to apply.