Comment 1 for bug 1467025

 system-image-cli -i
current build number: 67
device name: arale
channel: ubuntu-touch/rc-proposed/meizu.en
last update: 2015-07-23 12:17:48
version version: 67
version ubuntu: 20150723
version device: 20150709-8965e37
version custom: 20150716-819-8-42

select one completed task to delete while all the rest completed tasks
were deleted
reproduce steps:
1.launch tasks app
2.there are more than one completed task
exist
3.select one of the completed tasks to delete
4.all the completed tasks were deleted