Comment 2 for bug 896798

Hi, there's a slight problem with this issue.
The current fix is to remove the whole tag inside the text-buffer, but sometimes people like to use the tag with meaning inside a string also. For example:

Discuss with @boss about @work by 3pm.

Then if we move this task to the "Tasks without tags", then the @boss and @work would be removed, left with string:
Discuss with about by 3pm.