adding history tab in restritedteacher/editor
adding history tab in restritedteacher/editor

CodeKingdomsTeam/TouchDevelop,Aksoom-Hussain/TouchDevelop,ntoll/TouchDevelop,imadityab/FSE-2012-TouchDevelop-old,jle33/TouchDevelop,CodeKingdomsTeam/TouchDevelop,jle33/TouchDevelop,SoftwareEngineeringToolDemos/FSE-2012-TouchDevelop,SoftwareEngineeringToolDemos/FSE-2012-TouchDevelop,sedouard/TouchDevelop,SoftwareEngineeringToolDemos/FSE-2012-TouchDevelop,imadityab/FSE-2012-TouchDevelop-old,UIKit0/TouchDevelop,Aksoom-Hussain/TouchDevelop,CodeKingdomsTeam/TouchDevelop,jmptrader/TouchDevelop,sedouard/TouchDevelop,imadityab/FSE-2012-TouchDevelop-old,SoftwareEngineeringToolDemos/FSE-2012-TouchDevelop,jmptrader/TouchDevelop,jle33/TouchDevelop,MetSystem/TouchDevelop,MetSystem/TouchDevelop,ntoll/TouchDevelop,SoftwareEngineeringToolDemos/FSE-2012-TouchDevelop,MetSystem/TouchDevelop,jle33/TouchDevelop,jle33/TouchDevelop,ntoll/TouchDevelop,sedouard/TouchDevelop,CodeKingdomsTeam/TouchDevelop,SoftwareEngineeringToolDemos/FSE-2012-TouchDevelop,UIKit0/TouchDevelop,jmptrader/TouchDevelop,SoftwareEngineeringToolDemos/FSE-2012-TouchDevelop,Aksoom-Hussain/TouchDevelop,jmptrader/TouchDevelop,imadityab/FSE-2012-TouchDevelop-old,UIKit0/TouchDevelop