addon -> service

some day we will also add nginx, unbound etc here

src/views/system.html

@@ -60,15 +60,14 @@
   </div>
 
   <div class="text-left">
-    <h3>Addons</h3>
+    <h3>Services</h3>
   </div>
 
   <div class="card" style="margin-bottom: 15px;">
     <div class="row">
       <div class="col-md-12">
         <p>
-          Cloudron addons are addons for the apps. These include for example databases and authentication modules.<br/>
-          A full list of available addons can be found <a href="https://cloudron.io/developer/addons/" target="_blank">here</a>.
+          Cloudron services implement functionality such as databases, email and authentication.<br/>
         </p>
       </div>
     </div>
@@ -85,7 +84,7 @@
               <thead>
                 <tr>
                   <th style="width: 5%;"></th>
-                  <th style="width: 20%">Addon</th>
+                  <th style="width: 20%">Service</th>
                   <th style="width: 50%">Memory Usage</th>
                   <th style="width: 20%" class="text-center">Memory Limit</th>
                   <th style="width: 5%" class="text-right">Actions</th>