【报Bug】顶部选项卡tab在内容有输入框时，弹出软键盘切换tab时，tab会消失

详细问题描述

顶部tab在内容有输入框时，弹出软键盘切换tab时，tab会消失。

可在案例代码中tab-with-viewpagerindicator.html文件重现。

<div class="mui-slider-group">  
                    <div id="item1mobile" class="mui-slider-item mui-control-content mui-active">  
                        <div id="scroll1" class="mui-scroll-wrapper">  
                            <div class="mui-scroll">  
                                <ul class="mui-table-view">  
                                    <li class="mui-table-view-cell">  
                                        <input />  
                                    </li>  
                                </ul>  
                            </div>  
                        </div>  
                    </div>  
                    <div id="item2mobile" class="mui-slider-item mui-control-content">  
                        <div id="scroll2" class="mui-scroll-wrapper">  
                            <div class="mui-scroll">  
                                <ul class="mui-table-view">  
                                    <li class="mui-table-view-cell">  
                                        <input />  
                                    </li>  
                                </ul>  
                            </div>  
                        </div>  

                    </div>  
                    <div id="item3mobile" class="mui-slider-item mui-control-content">  
                        <div id="scroll3" class="mui-scroll-wrapper">  
                            <div class="mui-scroll">  
                                <div class="mui-loading">  
                                    <div class="mui-spinner">  
                                    </div>  
                                </div>  
                            </div>  
                        </div>  

                    </div>  
                </div>