Disable navigation drawer swipe open while reviewing

Users where having to put up with repeated unintentional navigation drawer openings due to swiping, such as when review gestures are enabled, and when the whiteboard is enabled. This change disables swipe open of the navigation drawer in the reviewer for all users, assuming that any user who tries to swipe open the navdrawer without success will resort to pressing the navdrawer indicator. Swipe close of the opened drawer continues to be enabled.