add History tab for kids; disable cancel on #derive:...
add History tab for kids; disable cancel on #derive:...

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