Admin Section: misc templates corrections and improvments

* reset admin vertical menu custom styles
* disable icons in admin vertical menu
* fix main content positioning in admin section
* fix table appearance in admin crud template
* new scope/center form: move submit button in record_action sticky area
* edit scope/center form: move submit button in record_action sticky area
* improve homogeneity in admin index pages: centers/scopes/users/jobs
* remove centered div old tags

src/Bundle/ChillMainBundle/Resources/views/UserJob/index.html.twig

@@ -2,12 +2,14 @@
 
 {% block admin_content %}
     {% embed '@ChillMain/CRUD/_index.html.twig' %}
+        
         {% block table_entities_thead_tr %}
             <th>id</th>
-            <th>{{ 'label'|trans }}</th>
-            <th>{{ 'active'|trans }}</th>
-            <th>&nbsp;</th>
+            <th>{{ 'Label'|trans }}</th>
+            <th>{{ 'Active'|trans }}</th>
+            <th>{{ 'Actions'|trans }}</th>
         {% endblock %}
+        
         {% block table_entities_tbody %}
             {% for entity in entities %}
                 <tr>
@@ -30,11 +32,12 @@
                 </tr>
              {% endfor %}
         {% endblock %}
-
+        
         {% block actions_before %}
             <li class='cancel'>
                 <a href="{{ path('chill_main_admin_central') }}" class="btn btn-cancel">{{'Back to the admin'|trans}}</a>
             </li>
         {% endblock %}
+        
     {% endembed %}
 {% endblock %}