minor improvements

src/main/java/de/srsoftware/web4rail/LookupTable.java

@@ -294,7 +294,10 @@ public class LookupTable extends BaseClass{
 		Vector<Object> head = new Vector<Object>();
 		head.add("");
 		if (LENGTH.equals(colType)) {
-			for (Object col : cols) head.add("&lt; "+col);
+			for (Object col : cols) {
+				if ("".equals(col)) continue;
+				head.add("&lt; "+col);
+			}
 		} else head.addAll(cols);
 		
 		table.addHead(head.toArray());

src/main/java/de/srsoftware/web4rail/actions/DetermineTrainInBlock.java

@@ -76,7 +76,8 @@ public class DetermineTrainInBlock extends Action {
 	}
 	
 	public String toString() {
-		return isSet(block) ? t("Determine, which train is in {}",block) : "["+t("Click here to select block!")+"]";
+		if (isSet(block)) return parked ? t("Determine, which train is parked in {}",block) : t("Determine, which train is in {}",block);
+		return "["+t("Click here to select block!")+"]";
 	};
 	
 	@Override

src/main/java/de/srsoftware/web4rail/actions/DisableEnableTile.java

@@ -89,6 +89,6 @@ public class DisableEnableTile extends Action {
 		if (newTile instanceof Shadow) newTile = ((Shadow)newTile).overlay();
 		if (isSet(newTile)) tile = newTile;
 		disable = !"enable".equals(params.get(STATE)); 
-		return properties();
+		return parent().properties();
 	}
 }