Add tweak rule to hide MenuButton dropdown arrow

base/src/main/java/atlantafx/base/theme/Tweaks.java

@@ -0,0 +1,7 @@
+package atlantafx.base.theme;
+
+/** Contains extra style class names introduced to tweak some controls view. */
+public final class Tweaks {
+
+    public static final String NO_ARROW  = "no-arrow";
+}

sampler/src/main/java/atlantafx/sampler/page/components/MenuButtonPage.java

@@ -1,6 +1,7 @@
 /* SPDX-License-Identifier: MIT */
 package atlantafx.sampler.page.components;
 
+import atlantafx.base.theme.Tweaks;
 import atlantafx.sampler.page.AbstractPage;
 import atlantafx.sampler.page.SampleBlock;
 import javafx.geometry.Side;
@@ -35,7 +36,8 @@ public class MenuButtonPage extends AbstractPage {
                 popupSideSample().getRoot(),
                 iconOnlySample().getRoot(),
                 outlinedSample().getRoot(),
-                disabledSample().getRoot()
+                disabledSample().getRoot(),
+                noArrowSample().getRoot()
         );
     }
 
@@ -234,6 +236,26 @@ public class MenuButtonPage extends AbstractPage {
         return new SampleBlock("Disabled", sample);
     }
 
+    private SampleBlock noArrowSample() {
+        var basicMenuBtn = new MenuButton("_Menu Button");
+        basicMenuBtn.getItems().setAll(menuItems(5));
+        basicMenuBtn.getStyleClass().addAll(Tweaks.NO_ARROW);
+
+        var flatMenuBtn = new MenuButton("Flat");
+        flatMenuBtn.getItems().setAll(menuItems(5));
+        flatMenuBtn.getStyleClass().addAll(FLAT, Tweaks.NO_ARROW);
+
+        var iconMenuBtn = new MenuButton();
+        iconMenuBtn.setGraphic(new FontIcon(Feather.MORE_HORIZONTAL));
+        iconMenuBtn.getItems().setAll(menuItems(5));
+        iconMenuBtn.getStyleClass().addAll(BUTTON_ICON, Tweaks.NO_ARROW);
+
+        var content = new HBox(10);
+        content.getChildren().addAll(basicMenuBtn, flatMenuBtn, iconMenuBtn);
+
+        return new SampleBlock("No Arrow", content);
+    }
+
     @SuppressWarnings("SameParameterValue")
     private MenuItem[] menuItems(int count) {
         return IntStream.range(0, count)

styles/src/components/_menu-button.scss

@@ -121,6 +121,20 @@ $separator-width:    0.75px !default;
   }
 }
 
+.menu-button {
+  &.no-arrow {
+    >.arrow-button {
+      -fx-padding: 0;
+
+      >.arrow {
+        -fx-shape: none;
+        -fx-scale-shape: false;
+        -fx-min-width: -1;
+      }
+    }
+  }
+}
+
 .split-menu-button {
 
   >.label {