Aesthetic improvements, mobile:
* on activation (done), the Subnavigation div (done), Resume, Previous, Next on mobile should highlight as a block
*Instructor user:
-/docs/mods/_standard/statistics/course_stats.php - remove inline styles, fix markup
+/docs/mods/_standard/statistics/course_stats.php - (template now includes graph)
* "0004796: Student user's Preferences template won't display"