Fix ModuleMode StackOverflowError

Caused when setState was called on a Mode that was already the active mode of it's parent.

Author: ZeroMemes

src/main/java/clientapi/module/ModuleMode.java

@@ -63,7 +63,9 @@ public ModuleMode(T parent, String name, String description) {
     @Override
     public final void setState(boolean state) {
         parent.setState(state);
-        parent.setMode(this);
+
+        if (parent.getMode() != this)
+            parent.setMode(this);
 
         if (state) {
             onEnable();