remove btn-default

src/server/views/layout/layout.html

@@ -137,7 +137,7 @@
         </a>
       </li>
       <li class="nav-item">
-        <a class="btn btn-default nav-link dropdown-toggle waves-effect waves-light" data-toggle="dropdown">
+        <a class="btn nav-link dropdown-toggle waves-effect waves-light" data-toggle="dropdown">
           <img src="{{ user|picture }}" class="picture rounded-circle" width="25" />
           <span class="user-name text-wrap ml-2">{{ user.name }}</span>
         </a>

src/server/views/widget/page_tabs.html

@@ -38,7 +38,7 @@
   {% if !isTrashPage() %}
     {% if page.isPortal() %}
     <li class="nav-item">
-      <a class="btn btn-default nav-link dropdown-toggle {% if not user %}dropdown-disabled{% endif %}" {% if user %}data-toggle="dropdown" {% endif %}>
+      <a class="btn nav-link dropdown-toggle {% if not user %}dropdown-disabled{% endif %}" {% if user %}data-toggle="dropdown" {% endif %}>
         <i class="icon-options-vertical"></i>
       </a>
       <div class="dropdown-menu dropdown-menu-right">