use timesheet description in invoices (#1079)

templates/invoice/renderer/default.html.twig

@@ -75,9 +75,9 @@
                 {% endif %}
                 <tr>
                     <td>{{ entry.begin|date_short }}</td>
-                    <td>
+                    <td contenteditable="true">
                         {% if entry.description is not empty %}
-                            {{ entry.description }}
+                            {{ entry.description|nl2br }}
                         {% else %}
                             {{ entry.activity.name }} / {{ entry.project.name }}
                         {% endif %}