Change version to 2.7.7

HMCLCore/src/main/java/org/jackhuang/hmcl/util/sys/ReflectionHelper.java

@@ -26,7 +26,7 @@ import java.security.PrivilegedExceptionAction;
 import sun.misc.Unsafe;
 
 /**
- *
+ * This class is for breaking the module system of Java 9.
  * @author huang
  */
 public class ReflectionHelper {

HMCLCore/src/main/java/org/jackhuang/hmcl/util/ui/Page.java

@@ -148,6 +148,11 @@ public class Page extends TopTabPage {
     Timer timer;
 
     protected boolean animationEnabled = true;
+    
+    public Page setAnimationEnabled(boolean a) {
+        animationEnabled = a;
+        return this;
+    }
 
     public void animate() {
         if (animationEnabled) {