Recursive merge the build arrays to avoid overriding the views index.

Because farm_sensor_listener_farm_sensor_view returns a build array with
the 'views' index set, this causes other views already in the build
array to be overwritten.

modules/farm/farm_sensor/farm_sensor.module

@@ -186,7 +186,7 @@ function farm_sensor_entity_view_alter(&$build, $type) {
 
   // Merge the asset view content into the build array.
   if (!empty($module_content)) {
-    $build = array_merge($build, $module_content);
+    $build = array_merge_recursive($build, $module_content);
   }
 }