Backport changes from ceaf28a to ubuntuusers theme

see inyokaproject/inyoka@ceaf28a

Author: chris34

inyoka_theme_ubuntuusers/static/style/main.less

@@ -751,7 +751,6 @@ table.syntaxtable {
   margin: 0;
 }
 
-
 .navi_sidebar {
   .container {
     background-repeat: repeat-x;
@@ -986,6 +985,7 @@ p.badges {
   text-align: center;
   img {
     margin: 0.8em 1em 0.8em 1em;
+    max-height: 60px;
   }
   img:hover {
     opacity: 0.5;