IMAGES - added share icon
UI - changes lock icon in tableView

harmonized iPhone and iPad
changed position, alpha and size
NAME CHANGE - TourVC to MainHelpVC
NAME CHANGE - TourVC to MainHelpVC
RENAMING - TourVC to MainHelpVC

To differentiate between KVO for various help pages
FIX - Updates MainHelpVC name after renaming the class
FEATURE - adds TrackVC help button

Shows/hides appropriately