minor: openbis config doc

SVN: 19111

openbis/dist/server/web-client.properties

@@ -3,6 +3,12 @@
 #
 #default-view-mode = SIMPLE
 
+# (optional) List of data set types for which there should be an image overview shown in dataset tables.
+# If not specified image overview will not be shown for any datasets 
+# even if some overview plugins have been configured. 
+#
+# data-set-types-with-image-overview = my-dataset-type-code1, my-dataset-type-code2
+
 # Configuration of entity (experiment, sample, data set, material) detail views.
 # Allows to hide chosen sections.
 #