title: Insert Link/Picture "From SharePoint" grayed out in the ribbon
body: <p>In the ribbon, I want to insert a picture or a link into a content page, but the "From Sharepoint" button is grayed out and I can only upload an image or insert a link "From Address". My field is rich text. I'm using SharePoint 2010.</p>
  
  <p>How can I make the link available?
  Thanks</p>