Refactor method names in UIUtil class

The method names 'clickOnNode' in the UIUtil class were renamed to 'isClickOnNode' to improve readability and understandability, since these methods return a boolean. The code where these methods are called was also updated to reflect this change.

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

@@ -75,7 +75,7 @@ public EnhancedPasswordField() {
         StackPane rightWrapper = new StackPane(rightIcon);
         rightWrapper.getStyleClass().add("right-icon-wrapper");
         rightWrapper.addEventHandler(MouseEvent.MOUSE_CLICKED, event -> {
-            if (UIUtil.clickOnNode(event)) {
+            if (UIUtil.isClickOnNode(event)) {
                 setShowPassword(!isShowPassword());
                 event.consume();
             }

gemsfx/src/main/java/com/dlsc/gemsfx/util/UIUtil.java

@@ -207,8 +207,8 @@ public static void copyToClipboard(String copyContent) {
      * @return {@code true} if the event is a single stable primary button click, {@code false} otherwise.
      * @throws NullPointerException if the event is null.
      */
-    public static boolean clickOnNode(MouseEvent event) {
-        return clickOnNode(event, false);
+    public static boolean isClickOnNode(MouseEvent event) {
+        return isClickOnNode(event, false);
     }
 
     /**
@@ -228,7 +228,7 @@ public static boolean clickOnNode(MouseEvent event) {
      *
      * @throws IllegalArgumentException if the event is not a mouse clicked event.
      */
-    public static boolean clickOnNode(MouseEvent event, boolean isSingleClick) {
+    public static boolean isClickOnNode(MouseEvent event, boolean isSingleClick) {
         if (event.getEventType() != MouseEvent.MOUSE_CLICKED) {
             throw new IllegalArgumentException("The event must be a mouse clicked event.");
             // return false;