SSDM-5544: not showing preview icon for files which start with .

openbis_standard_technologies/dist/core-plugins/eln-lims/1/as/webapps/eln-lims/html/js/views/DataSetForm/widgets/DatasetViewerModel.js

@@ -83,9 +83,10 @@ function DataSetViewerModel(containerId, profile, entity, serverFacade, datastor
     }
 
 	this._isIconableImage = function(pathInDataSet) {
-        return this._hasExtension(pathInDataSet, ["jpg", "jpeg", "png", "gif"]);
+        var filename = pathInDataSet.split('/').slice(-1)[0];
+        return !filename.startsWith('.') && this._hasExtension(pathInDataSet, ["jpg", "jpeg", "png", "gif"]);
     }
-	
+
 	this._isJupyterNotebook = function(pathInDataSet) {
         return this._hasExtension(pathInDataSet, ["ipynb"]);
     }