Unable to remove tags

Created by: Forage

Sometimes you get unwanted tags because of a typo, especially because tags don't get auto-completed in the GNOME extension (bug #114 and #12), or simply because you change your mind afterwards. The result is tags you can't remove any more, despite an option to remove tags from the complete field. Removing tags from this field in the preferences still presents all of them again when you return to the list.

Steps to reproduce:

1. Add activity through the extension "reading e-mail@work, #pita"
2. Add activity through the extension "poo@work, #relieve"
3. Open the preferences through "Tracker settings" option in the extension and go to the "Categories and Tags" tab
4. Remove "pita" from the auto-complete list
5. Close the preferences and repeat step 3.

Result:

1. The tag "pita" is still present in the auto-complete list

This happens for tags that are being used for existing activities as well as non-used tags because you changed/fixed them by altering an existing activity.

OS: Ubuntu 14.04 Hamster: 3.0really1.03.3+git2370-0dylanmccall1~ubuntu14.04.1 from https://launchpad.net/~dylanmccall/+archive/ubuntu/hamster-time-tracker-git-stable

Let me know if you need any more information.