Takes up more of the larger space now, scrollable list, fixed bad
version ref in URL, onclick highlight this elem and ID added as hook
plus added missing end anchor tag. Info container added, versions
available to JS and function added to highlight link.
Include settings instead, plus CodeMirror lib and CSS
Set some CSS classes, and CodeMirror CSS files
Display clickable list of backups
DIV container added for editor display and buttons
Display CodeMirror instance and setup 2 x functions to open backup in
new tab or diff pane
