Fix different button sizes in new publisher

app/views/publisher/_publisher_bootstrap.html.haml

@@ -44,7 +44,8 @@
       .row-fluid.options_and_submit
         .public_toggle
           %button.btn.btn-default.pull-left#hide_publisher{:title => t('shared.publisher.discard_post')}
-            =t('cancel')
+            %span.text
+              =t('cancel')
 
           .btn-toolbar.pull-right
             %span#publisher_service_icons
@@ -57,10 +58,12 @@
             = render :partial => "publisher/aspect_dropdown", :locals => { :selected_aspects => selected_aspects } 
 
             %button{ :disabled => ("disabled" if publisher_hidden_text.blank?), :class => 'btn btn-default post_preview_button'}
-              = t('shared.publisher.preview')
+              %span.text
+                = t('shared.publisher.preview')
 
             %button#submit.btn.btn-primary.creation{ :disabled => ("disabled" if publisher_hidden_text.blank?), :tabindex => 2}
-              = t('shared.publisher.share')
+              %span.text
+                = t('shared.publisher.share')
 
           .facebox_content
             #question_mark_pane