fix btn-default in some other cases

wiki/forms.py

@@ -177,7 +177,7 @@ class SelectWidgetBootstrap(forms.Select):
         final_attrs = self.build_attrs(attrs, name=name)
         output = ["""<div%(attrs)s>"""
                   """    <button class="btn btn-group-label%(disabled)s" type="button">%(label)s</button>"""
-                  """    <button class="btn dropdown-toggle%(disabled)s" type="button" data-toggle="dropdown">"""
+                  """    <button class="btn btn-default dropdown-toggle%(disabled)s" type="button" data-toggle="dropdown">"""
                   """        <span class="caret"></span>"""
                   """    </button>"""
                   """    <ul class="dropdown-menu">"""

wiki/templates/wiki/history.html

@@ -79,7 +79,7 @@
             </div>
             <div class="pull-right" style="vertical-align: middle; margin: 8px 8px;">
               {% if revision == article.current_revision %}
-              <a href="#" class="btn disabled">
+              <a href="#" class="btn btn-default disabled">
                 <span class="icon-lock"></span>
                 {% trans "Preview this revision" %}
               </a>