use timesheet description in invoices (#1079)

templates/invoice/renderer/timesheet.html.twig

@@ -72,9 +72,9 @@
                 {% if model.query.user is empty %}
                     <td>{{ widgets.username(entry.user) }}</td>
                 {% endif %}
-                <td>
+                <td contenteditable="true">
                     {% if entry.description is not empty %}
-                        {{ entry.description }}
+                        {{ entry.description|nl2br }}
                     {% else %}
                         {{ entry.activity.name }} / {{ entry.project.name }}
                     {% endif %}