adding wrapped admin modifier for spacing

opentech/static_src/src/sass/components/_wrapper.scss

@@ -21,6 +21,10 @@
         background-color: $color--white;
     }
 
+    &--admin {
+        padding: 20px;
+    }
+
     &--breakout {
         position: relative;
         right: 50%;

opentech/templates/base-admin.html

@@ -67,7 +67,7 @@
             </div>
         </header>
 
-        <main class="wrapper wrapper--large wrapper--main">
+        <main class="wrapper wrapper--large wrapper--main wrapper--admin">
             {% block content %}{% endblock %}
         </main>