Refactor Admin settings tabs

- Rename partial views for tabs.
- Extract tables settings to reuse across the tabs.

app/views/admin/settings/_settings_table.html.erb

@@ -0,0 +1,31 @@
+<table>
+  <thead>
+    <tr>
+      <th><%= t("admin.settings.setting_name") %></th>
+      <th><%= t("admin.settings.setting_value") %></th>
+    </tr>
+  </thead>
+  <tbody>
+    <% settings.each do |setting| %>
+      <tr>
+        <td class="small-6">
+          <strong><%= t("settings.#{setting.key}") %></strong>
+          <br>
+          <span class="small">
+            <%= t("settings.#{setting.key}_description", default: t("admin.settings.no_description")) %>
+          </span>
+        </td>
+        <td class="small-6">
+          <%= form_for(setting, url: admin_setting_path(setting), html: { id: "edit_#{dom_id(setting)}"}) do |f| %>
+            <div class="small-12 medium-6 large-8 column">
+              <%= f.text_area :value, label: false, id: dom_id(setting), lines: 1 %>
+            </div>
+            <div class="small-12 medium-6 large-4 column">
+              <%= f.submit(t("admin.settings.index.update_setting"), class: "button hollow expanded") %>
+            </div>
+          <% end %>
+        </td>
+      </tr>
+    <% end %>
+  </tbody>
+</table>