Netcode changes, new pathfinding, fixed enemies jittering when stuck

desktop/src/io/anuke/mindustry/desktop/DesktopLauncher.java

@@ -81,6 +81,11 @@ public class DesktopLauncher {
 				}
 			}
 
+			@Override
+			public void showError(String text){
+				JOptionPane.showMessageDialog(null, text);
+			}
+
 			@Override
 			public void updateRPC() {
 				DiscordRichPresence presence = new DiscordRichPresence();