Enable name change

src/components/UserNameForm.js

@@ -78,7 +78,7 @@ class EmailForm extends React.Component {
             <Input {...usernameProps.input}/>,
           )}
           {
-            <div class="alert alert-warning" role="alert">改名已经关闭。改名将在1月，4月，7月和10月的第一周开启。</div>
+            <div class="alert alert-warning" role="alert">修改用户名后战绩会清零、也会失去绑定的云卡组。建议提前备份卡组。改名在4月8日23：59关闭。</div>
           }
 
         </FormItem>
@@ -90,7 +90,7 @@ class EmailForm extends React.Component {
         </FormItem>
 
         <FormItem>
-          <SubmitButton disabled/>
+          <SubmitButton />
         </FormItem>
       </Form>
     );