fix display of hours

app/views/entries/index.html.erb

@@ -203,7 +203,7 @@
           </td>
           <td>
             <% if entry.hours.to_i > 0 || entry.minutes.to_i > 0 %>
-              <%= "#{entry.hours} Stunden, #{entry.minutes} Minuten" %>
+              <%= formatted_duration(entry) if formatted_duration(entry) %>
             <% end %>
             <td>
               <%= ["Fortbildung", "Semesterkosten"].include?(entry.entry_art) ? entry.entry_art : entry.praktikums_typ.capitalize %>