Do not show context for monolingual translations in zen mode

In most cases it's just not important identifier for monolingual
translations.

Fixes #659
Signed-off-by: Michal Čihař <michal@cihar.com>

weblate/html/zen-units.html

@@ -7,7 +7,7 @@
 <td>{{ item.unit.position }}</td>
 <td>
 {% get_location_links item.unit %}
-{% if item.unit.context %}
+{% if item.unit.context and not item.unit.translation.subproject.has_template %}
 {% format_translation item.unit.context search_match=search_query %}
 {% endif %}
 </td>