feat: add setIconBlank() method

Deprecate setIconSpacing(boolean) method that does not use its parameter.
Update demo.

Close #61

Author: ngonzalezpazFC

src/main/java/com/flowingcode/addons/applayout/MenuItem.java

@@ -46,6 +46,8 @@
 @Tag("fc-menuitem")
 public class MenuItem extends SlottedMenuItem implements HasOrderedComponents<MenuItem>, HasMenuItemCommands<MenuItem>, HasMenuItemIcon<MenuItem> {
 
+	static final String BLANK = "fc-menuitem-icons:empty";
+
 	/** No argument constructor */
 	public MenuItem() {}
 
@@ -134,9 +136,16 @@ public MenuItem configure(Consumer<MenuItem> consumer) {
 		return this;
 	}
 
+	/**
+	 * @deprecated This method ignores the parameter. Use {@link #setIconBlank()}.
+	 */
+	@Deprecated
 	public void setIconSpacing(boolean value) {
-		setIcon("fc-menuitem-icons:empty");
+		setIcon(MenuItem.BLANK);
 	}
 
+	public void setIconBlank() {
+		setIcon(MenuItem.BLANK);
+	}
 }
 

src/test/java/com/flowingcode/addons/applayout/ApplayoutDemoView.java

@@ -172,14 +172,14 @@ private Component[] createMenuItems() {
 
 				new MenuItem("No icon"),
 
-				new MenuItem("No icon, spaced").configure(mi -> mi.setIconSpacing(true)),
+				new MenuItem("No icon, spaced").configure(mi -> mi.setIconBlank()),
 
 				// menu item with custom content
 				new MenuItem("Toggle").configure(mi -> mi.add(new PaperToggle())),
 
 				new MenuItem("Toggle", VaadinIcon.BACKSPACE).configure(mi -> mi.add(new PaperToggle())),
 
-				new MenuItem("Toggle", "fc-menuitem-icons:empty").configure(mi -> mi.add(new PaperToggle())),
+				new MenuItem("Toggle", MenuItem.BLANK).configure(mi -> mi.add(new PaperToggle())),
 
 				new MenuItem("External link").setHref("http://www.google.com"),