Close "About" and "Introduction" when Escape key is pressed

src/main/java/com/sparrowwallet/sparrow/AppController.java

@@ -351,7 +351,9 @@ public class AppController implements Initializable {
             stage.setTitle("About " + MainApp.APP_NAME);
             stage.initStyle(org.controlsfx.tools.Platform.getCurrent() == org.controlsfx.tools.Platform.OSX ? StageStyle.UNDECORATED : StageStyle.DECORATED);
             stage.setResizable(false);
-            stage.setScene(new Scene(root));
+            Scene scene = new Scene(root);
+            AppServices.onEscapePressed(scene, stage::close);
+            stage.setScene(scene);
             controller.setStage(stage);
             controller.initializeView();
             setStageIcon(stage);
@@ -1884,4 +1886,4 @@ public class AppController implements Initializable {
     public void recieveAction(ReceiveActionEvent event) {
         selectTab(event.getWallet());
     }
-}
+}

src/main/java/com/sparrowwallet/sparrow/AppServices.java

@@ -31,6 +31,7 @@ import javafx.scene.control.Dialog;
 import javafx.scene.control.Label;
 import javafx.scene.image.Image;
 import javafx.scene.image.ImageView;
+import javafx.scene.input.KeyCode;
 import javafx.scene.text.Font;
 import javafx.stage.Screen;
 import javafx.stage.Stage;
@@ -449,6 +450,14 @@ public class AppServices {
         stage.hide();
     }
 
+    public static void onEscapePressed(Scene scene, Runnable runnable) {
+        scene.setOnKeyPressed(event -> {
+            if(event.getCode() == KeyCode.ESCAPE) {
+                runnable.run();
+            }
+        });
+    }
+
     public Map<Wallet, Storage> getOpenWallets() {
         Map<Wallet, Storage> openWallets = new LinkedHashMap<>();
         for(List<WalletTabData> walletTabDataList : walletWindows.values()) {

src/main/java/com/sparrowwallet/sparrow/WelcomeDialog.java

@@ -12,6 +12,7 @@ public class WelcomeDialog extends Dialog<Mode> {
     public WelcomeDialog() {
         final DialogPane dialogPane = getDialogPane();
         AppServices.setStageIcon(dialogPane.getScene().getWindow());
+        AppServices.onEscapePressed(dialogPane.getScene(), this::close);
 
         try {
             FXMLLoader welcomeLoader = new FXMLLoader(AppServices.class.getResource("welcome.fxml"));