Folder listing: showing the size of a folder

diff --git a/src/main/java/org/olat/core/commons/modules/bc/_i18n/LocalStrings_de.properties b/src/main/java/org/olat/core/commons/modules/bc/_i18n/LocalStrings_de.properties
--- a/src/main/java/org/olat/core/commons/modules/bc/_i18n/LocalStrings_de.properties
+++ b/src/main/java/org/olat/core/commons/modules/bc/_i18n/LocalStrings_de.properties
@@ -86,6 +86,7 @@
 mf.cancel=Abbrechen
 mf.comment=Beschreibung
 mf.edit=Metadaten bearbeiten
+mf.elements=Element(e)
 mf.error.filename.empty=Der Name des Objektes darf nicht leer sein.
 mf.error.filename.exists=Es gibt bereits ein Objekt mit diesem Namen.
 mf.error.filename.invalidchars=Der Name des Objekts enth\u00E4lt ung\u00FCltige Zeichen.
diff --git a/src/main/java/org/olat/core/commons/modules/bc/_i18n/LocalStrings_en.properties b/src/main/java/org/olat/core/commons/modules/bc/_i18n/LocalStrings_en.properties
--- a/src/main/java/org/olat/core/commons/modules/bc/_i18n/LocalStrings_en.properties
+++ b/src/main/java/org/olat/core/commons/modules/bc/_i18n/LocalStrings_en.properties
@@ -86,6 +86,7 @@
 mf.cancel=Cancel
 mf.comment=Description
 mf.edit=Edit metadata
+mf.elements=element(s)
 mf.error.filename.empty=You have to enter a name for this object.
 mf.error.filename.exists=An object with this name already exists.
 mf.error.filename.invalidchars=Name of object contains invalid characters.
diff --git a/src/main/java/org/olat/core/commons/modules/bc/components/ListRenderer.java b/src/main/java/org/olat/core/commons/modules/bc/components/ListRenderer.java
--- a/src/main/java/org/olat/core/commons/modules/bc/components/ListRenderer.java
+++ b/src/main/java/org/olat/core/commons/modules/bc/components/ListRenderer.java
@@ -357,6 +357,11 @@
 			sb.append(Formatter.formatBytes(leaf.getSize()));
 			sb.append("</span>");
 		}
+		else if (child instanceof VFSContainer) {
+			sb.append("<span class='text-muted small'>");
+			sb.append(((VFSContainer) child).getItems().size());
+			sb.append(" "+translator.translate("mf.elements")+"</span>");
+		}
 		sb.append("</td><td>");
 		
 		// last modified