More general class and visible preview

services/web/public/stylesheets/app/cms-page.less

@@ -4,7 +4,7 @@
   including About and Blog
 */
 .cms-page {
-  .contact-btn-description {
+  .btn-description {
     margin-right: @margin-sm;
   }
 
@@ -18,7 +18,7 @@
   */
   .cms-preview {
     background-color: @blue;
-    color: black;
+    color: white;
     font-weight: bold;
     height: @navbar-padding-vertical;
     left: 0;