Add error templates for 400 and label each item optional Added documenttion on adding a _generic.400.html template which can be used to display errors in FTS query syntax. It can include the chrome supplied by page.html which makes navigating etc. easier. Also labeled each section title in the current release optional as none of them are required upgrades. If we add a required step that will break a tracker if not done, it should be labeled required and put at the top of the upgrading section.