Add method to return refresh model object.

Signed-off-by: Aron Cedercrantz <aron@cedercrantz.se>
Fix voting on questions in so many ways.

- No longer reloads the entire table view instead we only reload the
score label and the vote buttons.
- The vote buttons now toggle correctly.
- The voting now actually works (wasn’t saved in the aux db previously).
- The vote method has been greatly re-written and now sports a more
logical and isolated way of operating, you tell it the new vote state
and it will calculate how to update the aux table and the post total.

Signed-off-by: Aron Cedercrantz <aron@cedercrantz.se>
Merge branch 'master' of https://github.com/opfo/app

* 'master' of https://github.com/opfo/app:
  Fix selecting wrong tag - one shall not code at 26°C
  Fix tag doubletap to add tag to current selection of tags.