Unify Officing and Admin results views

Unify the code from app/views/officing/results/index.html.erb with
app/views/admin/poll/results/_result.html.erb. This prepares the ground
to extract a component in the next commit and avoid duplication.

app/views/officing/results/index.html.erb

@@ -31,11 +31,11 @@
       <% @poll.questions.each do |question| %>
         <h3><%= question.title %></h3>
 
-        <table>
+        <table class="margin">
           <thead>
             <tr>
-              <th><%= t("officing.results.index.table_answer") %></th>
+              <th><%= t("admin.results.result.table_answer") %></th>
-              <th><%= t("officing.results.index.table_votes") %></th>
+              <th class="text-center"><%= t("admin.results.result.table_votes") %></th>
             </tr>
           </thead>
           <tbody>
@@ -43,7 +43,7 @@
               <% by_answer = by_question[question.id].present? ? by_question[question.id].group_by(&:answer) : {} %>
               <tr id="question_<%= question.id %>_<%= i %>_result">
                 <td><%= option.title %></td>
-                <td><%= by_answer[option.title].present? ? by_answer[option.title].first.amount : 0 %></td>
+                <td class="text-center"><%= by_answer[option.title].present? ? by_answer[option.title].sum(&:amount) : 0 %></td>
               </tr>
             <% end %>
           </tbody>

config/locales/en/officing.yml

@@ -57,8 +57,6 @@ en:
       index:
         no_results: "No results"
         results: Results
-        table_answer: Answer
-        table_votes: Votes
         table_whites: "Totally blank ballots"
         table_nulls: "Invalid ballots"
         table_total: "Valid ballots"

config/locales/es/officing.yml

@@ -57,8 +57,6 @@ es:
       index:
         no_results: "No hay resultados"
         results: Resultados
-        table_answer: Respuesta
-        table_votes: Votos
         table_whites: "Papeletas totalmente en blanco"
         table_nulls: "Papeletas nulas"
         table_total: "Papeletas válidas"