15.1. Add a 'Like Button'
15.1.5 Making the AJAX request
15.2.4 Update Base Template
15.2.6. Add AJAX to Request Suggestions
Add inactive buttons to each category on sidebar
15.3.1. Stuck
Make sidebar Add button disabled separately on click
15.3.1. Almost there
15.3.1 Problem with Add Page link
15.3.1. Finish