Update for fix "full-tick diplayed when checking an app in main activity but dangerous were not ticked"

It correct the issue by preventing to untick a half-ticked checkbox that you just ticked before.
And when the permission filter is activated, it shows a normal tick in the checkbox instead of a half-tick when you tick the checkbox.
Merge pull request #602 from tonymanou/patch-2

Update for fix "full-tick diplayed when checking an app in main activity...