Add ARIA labels to moderation checkboxes

This way it'll be easier for people using screen readers to know which
element the checkbox is related to.

Note that we're using the `aria-label` attribute because it makes
testing with Capybara easier than using the `aria-labelledby` attribute.
The only exception are the comments, since comments don't have a title
and there isn't a proper label for them. In this case, we're using the
title of the associated commentable as the label; we might change it in
the future since there might be many comments for the same commentable.

app/views/moderation/budgets/investments/index.html.erb

@@ -27,7 +27,11 @@
             </div>
           </td>
           <td class="text-center">
-            <%= check_box_tag "budget_investment_ids[]", investment.id, nil, id: "#{dom_id(investment)}_check" %>
+            <%= check_box_tag "budget_investment_ids[]",
+                              investment.id,
+                              nil,
+                              id: "#{dom_id(investment)}_check",
+                              "aria-label": investment.title %>
           </td>
         </tr>
       <% end %>

app/views/moderation/comments/index.html.erb

@@ -12,7 +12,9 @@
         <tr id="comment_<%= comment.id %>">
           <td>
             <%= comment.commentable_type.constantize.model_name.human %> -
-            <%= link_to comment.commentable.title, commentable_path(comment) %>
+            <%= link_to comment.commentable.title,
+                        commentable_path(comment),
+                        id: dom_id(comment, :title) %>
             <br>
             <span class="date"><%= l comment.updated_at.to_date %></span>
             <span class="bullet">&nbsp;&bull;&nbsp;</span>
@@ -25,7 +27,11 @@
             </div>
           </td>
           <td class="text-center">
-            <%= check_box_tag "comment_ids[]", comment.id, nil, id: "#{dom_id(comment)}_check" %>
+            <%= check_box_tag "comment_ids[]",
+                              comment.id,
+                              nil,
+                              id: "#{dom_id(comment)}_check",
+                              "aria-labelledby": dom_id(comment, :title) %>
           </td>
         </tr>
       <% end %>

app/views/moderation/debates/index.html.erb

@@ -24,7 +24,11 @@
             </div>
           </td>
           <td class="text-center">
-            <%= check_box_tag "debate_ids[]", debate.id, nil, id: "#{dom_id(debate)}_check" %>
+            <%= check_box_tag "debate_ids[]",
+                              debate.id,
+                              nil,
+                              id: "#{dom_id(debate)}_check",
+                              "aria-label": debate.title %>
           </td>
         </tr>
       <% end %>

app/views/moderation/proposal_notifications/index.html.erb

@@ -23,7 +23,8 @@
             <%= check_box_tag "proposal_notification_ids[]",
                               proposal_notification.id,
                               nil,
-                              id: "#{dom_id(proposal_notification)}_check" %>
+                              id: "#{dom_id(proposal_notification)}_check",
+                              "aria-label": proposal_notification.title %>
           </td>
         </tr>
       <% end %>

app/views/moderation/proposals/index.html.erb

@@ -24,7 +24,11 @@
             </div>
           </td>
           <td class="text-center">
-            <%= check_box_tag "proposal_ids[]", proposal.id, nil, id: "#{dom_id(proposal)}_check" %>
+            <%= check_box_tag "proposal_ids[]",
+                              proposal.id,
+                              nil,
+                              id: "#{dom_id(proposal)}_check",
+                              "aria-label": proposal.title %>
           </td>
         </tr>
       <% end %>

spec/system/moderation/budget_investments_spec.rb

@@ -55,9 +55,7 @@ describe "Moderate budget investments" do
           visit moderation_budget_investments_path
           click_link "All"
 
-          within("#investment_#{investment.id}") do
-            check "budget_investment_#{investment.id}_check"
-          end
+          check investment.title
         end
 
         scenario "Hide the investment" do

spec/system/moderation/debates_spec.rb

@@ -49,9 +49,7 @@ describe "Moderate debates" do
           visit moderation_debates_path
           click_link "All"
 
-          within("#debate_#{debate.id}") do
-            check "debate_#{debate.id}_check"
-          end
+          check debate.title
         end
 
         scenario "Hide the debate" do

spec/system/moderation/proposal_notifications_spec.rb

@@ -57,9 +57,7 @@ describe "Moderate proposal notifications" do
           visit moderation_proposal_notifications_path
           click_link "All"
 
-          within("#proposal_notification_#{proposal_notification.id}") do
-            check "proposal_notification_#{proposal_notification.id}_check"
-          end
+          check proposal_notification.title
         end
 
         scenario "Hide the proposal" do

spec/system/moderation/proposals_spec.rb

@@ -48,9 +48,7 @@ describe "Moderate proposals" do
           visit moderation_proposals_path
           click_link "All"
 
-          within("#proposal_#{proposal.id}") do
-            check "proposal_#{proposal.id}_check"
-          end
+          check proposal.title
         end
 
         scenario "Hide the proposal" do