Hide allow forks control if forking is disabled

src/main/java/com/gitblit/wicket/panels/AccessPolicyPanel.html

 		</div>
 	</div>
 	
+	<div wicket:id="allowForks"></div>
+	
+<wicket:fragment wicket:id="allowForksFragment">
 	<hr />
 	
 	<div wicket:id="allowForks"></div>
-	
+</wicket:fragment>
 </wicket:panel>
 </body>
 </html>

src/main/java/com/gitblit/wicket/panels/AccessPolicyPanel.java

 import org.apache.wicket.markup.html.form.RadioGroup;
 import org.apache.wicket.markup.html.list.ListItem;
 import org.apache.wicket.markup.html.list.ListView;
+import org.apache.wicket.markup.html.panel.Fragment;
 import org.apache.wicket.model.IModel;
 import org.apache.wicket.model.Model;
 
 		}
 		add(policiesGroup);
 
-		allowForks = Model.of(true);
-		add(new CheckboxOption("allowForks",
+		allowForks = Model.of(app().settings().getBoolean(Keys.web.allowForking, true));
+		if (allowForks.getObject()) {
+			Fragment fragment = new Fragment("allowForks", "allowForksFragment", this);
+			fragment.add(new CheckboxOption("allowForks",
 				getString("gb.allowForks"),
 				getString("gb.allowForksDescription"),
-				allowForks).setEnabled(app().settings().getBoolean(Keys.web.allowForking, true)));
+				allowForks));
+			add(fragment);
+		} else {
+			add(new Label("allowForks").setVisible(false));
+		}
 
 		setOutputMarkupId(true);
 	}