add splashscreen for mobile-dev

forge-gui-mobile-dev/src/forge/app/Main.java

@@ -10,6 +10,7 @@ import org.apache.commons.lang3.tuple.Pair;
 
 import javax.imageio.ImageIO;
 import java.awt.Desktop;
+import java.awt.SplashScreen;
 import java.awt.image.BufferedImage;
 import java.io.File;
 import java.io.IOException;
@@ -89,6 +90,14 @@ public class Main {
             System.exit(0);
         }
 
+        @Override
+        public void closeSplashScreen() {
+            SplashScreen splash = SplashScreen.getSplashScreen();
+            if (splash != null) {
+                splash.close();
+            }
+        }
+
         @Override
         public boolean isTablet() {
             return true; //treat desktop the same as a tablet