Update paging controls visibility logic and demo layout

Adjusted the visibility criteria for message labels in PagingControlsSkin to consider page size. Also included page size property in bindings. Corrected the VBox layout in PagingControlsApp demo to include flowPane. Removed an unnecessary line break in the PagingControls class.

gemsfx-demo/src/main/java/com/dlsc/gemsfx/demo/PagingControlsApp.java

@@ -103,7 +103,7 @@ private VBox createSection(int pageSize, int itemCount, MessageLabelStrategy mes
         flowPane.setVgap(10);
         flowPane.setHgap(20);
 
-        VBox vBox = new VBox(10, pagingControls); //, flowPane);
+        VBox vBox = new VBox(10, pagingControls, flowPane);
         vBox.setMaxHeight(Region.USE_PREF_SIZE);
 
         return vBox;

gemsfx/src/main/java/com/dlsc/gemsfx/PagingControls.java

@@ -49,7 +49,6 @@ public PagingControls() {
             int endIndex = startIndex + getPageSize() - 1;
 
             endIndex = Math.min(endIndex, getTotalItemCount());
-
             return "Showing items " + startIndex + " to " + endIndex + " of " + getTotalItemCount();
         });
 

gemsfx/src/main/java/com/dlsc/gemsfx/skins/PagingControlsSkin.java

@@ -77,9 +77,9 @@ private void createButtons() {
             return switch (messageLabelStrategy) {
                 case ALWAYS_SHOW -> true;
                 case HIDE -> false;
-                case SHOW_WHEN_NEEDED -> view.getTotalItemCount() > 0;
+                case SHOW_WHEN_NEEDED -> view.getTotalItemCount() > view.getPageSize();
             };
-        }, view.messageLabelStrategyProperty(), view.totalItemCountProperty()));
+        }, view.messageLabelStrategyProperty(), view.totalItemCountProperty(), view.pageSizeProperty()));
         messageLabel.managedProperty().bind(messageLabel.visibleProperty());
 
         firstPageButton = createFirstPageButton();