openolat#50: show message when user tries to delete a still active course

src/main/java/org/olat/repository/_i18n/LocalStrings_de.properties

@@ -260,6 +260,7 @@ details.delete.acknowledge.error=Bitte best\u00e4tigen.
 details.delete.acknowledge.msg=Alle Dateien werden definitiv gel\u00f6scht und k\u00f6nnen nicht mehr wiederhergestellt werden.
 details.delete.alt={0} l\u00f6schen
 details.delete.locked.until.desc=Diese Lernressource kann nicht vor dem {0} gel\u00f6scht werden.
+details.delete.locked.open.desc=Diese Lernressource muss zuerst beendet werden.
 details.delete.soft.acknowledge.msg=Die Lernressource wird als gel\u00f6scht markiert.
 details.delete.soft.desc=Mit dieser Funktion wird die Lernressource als gel\u00f6scht markiert.
 details.delete.soft.desc.1=Die Benutzerdaten werden aus dem Kurs entfernt.

src/main/java/org/olat/repository/_i18n/LocalStrings_en.properties

@@ -268,6 +268,7 @@ details.delete.notOwner=not owner
 details.delete.references=Do you wish to delete the referenced learning resources too?
 details.delete.safety.interval=14
 details.delete.locked.until.desc=This learning resource can't be deleted until {0}.
+details.delete.locked.open.desc=This learning resource can only be deleted when it has been closed before.
 details.delete.soft.acknowledge.msg=The learning resource will be marked as deleted.
 details.delete.soft.auto.desc=<strong>The course will be automatically deleted at {0}.</strong>
 details.delete.soft.desc=Using this method the learning resource will be marked as deleted.

src/main/java/org/olat/repository/ui/_content/lifecycle_change.html

@@ -18,13 +18,18 @@
 			$r.render("delete")
 		</div>
 	</div>
-#end
+#else
 
 #if($r.isNotNull($deleteLockedUntil))
-	<h4>$r.translate("details.delete")</h4>
 	<div class="o_error">
 		<p>$r.translate("details.delete.locked.until.desc", $deleteLockedUntil)</p>
 	</div>	
+#else
+	<div class="o_error">
+		<p>$r.translate("details.delete.locked.open.desc")</p>
+	</div>
+#end
+
 #end
 
 </fieldset>