adds dates validation to polls

app/views/admin/poll/polls/_form.html.erb

@@ -9,13 +9,19 @@
 
   <div class="row">
     <div class="small-12 medium-6 column">
-      <label><%= t("admin.polls.form.starts_at") %></label>
-      <input type="date">
+      <%= f.label :starts_at, t("admin.polls.form.starts_at") %>
+      <%= f.text_field :starts_at,
+                        label: false,
+                        value: @poll.starts_at.present? ? l(@poll.starts_at.to_date) : nil,
+                        class: "js-calendar-full" %>
     </div>
 
     <div class="small-12 medium-6 column">
-      <label><%= t("admin.polls.form.ends_at") %></label>
-      <input type="date">
+      <%= f.label :ends_at, t("admin.polls.form.ends_at") %>
+      <%= f.text_field :ends_at,
+                        label: false,
+                        value: @poll.ends_at.present? ? l(@poll.ends_at.to_date) : nil,
+                        class: "js-calendar-full" %>
     </div>
   </div>
 

app/views/admin/poll/polls/show.html.erb

@@ -1,8 +1,6 @@
-<%= render "shared/back_link" %>
-<div class="clear"></div>
-
 <h2 class="inline-block">
   <%= @poll.name %>
+  <small><%= l @poll.starts_at.to_date %> - <%= l @poll.ends_at.to_date %></small>
 </h2>
 
 <%= link_to t("admin.actions.edit"),