Move the summing logic from the template into the component. Introduce
a votes_for(option) method that looks up grouped partial results and
returns the total amount or 0.
Note that we have the same code in the officing section.
Then we can use the same component.
Note also that we are removing the parts of the system specs that are now
covered by the component itself, and taking the chance to unify tests.
In these removals and unifications we take into account that there are
other specs which already cover user interaction in this section.