style: fix code smells

Author: ngonzalezpazFC

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

@@ -39,7 +39,7 @@ public abstract class AbstractFcAppRouterLayout extends Div implements RouterLay
 
 	private AppLayout app;
 
-	public AbstractFcAppRouterLayout() {
+	protected AbstractFcAppRouterLayout() {
 		getElement().getStyle().set("width", "100%");
 		getElement().getStyle().set("height", "100vh");
 		getElement().getStyle().set("display", "flex");

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

@@ -89,7 +89,7 @@ public void setMenuItems(Component... menuitems) {
 	}
 
 	public void clearMenuItems() {
-		drawer.setMenuItems(new ArrayList<MenuItem>());
+		drawer.setMenuItems(new ArrayList<>());
 	}
 
 	public void setToolbarIconButtons(Component... components) {

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

@@ -60,7 +60,7 @@ public Element getElement() {
 		@Override
 		public int getComponentCount() {
 			return (int) getChildren().count();
-		};
+		}
 
 		@Override
 		public Component getComponentAt(int index) {
@@ -73,7 +73,7 @@ public Component getComponentAt(int index) {
 	                .orElseThrow(() -> new IllegalArgumentException(
 	                        "The 'index' argument should not be greater than or equals to the number of children components. It was: "
 	                                + index));
-	    };
+	    }
 
 	};