do not use .icon on title

Author: alexandermeindl

app/views/hedgedocs/show.html.slim

@@ -7,7 +7,7 @@
 
 - html_title(l(:label_hedgedoc_pad_plural))
 
-h2#page-title.icon
+h2#page-title
   = svg_icon_tag 'filelist', size: 24
   = l :label_hedgedoc_pad_plural