clickable tags and sign-out feature

1. goes to tag-search page when user tapped tags.
2. add sign-out button to my-profile page
'cancel' capability in create item flow
Changed error message for deleting anno
[Fixed] Deleting anno is throwing internal server error
Merge branch 'develop' of github.com:usersource/anno into develop
Merge branch 'develop' of github.com:usersource/anno into feature/plugin-update