fix i18n strings

app/ygopro.component.html

@@ -92,7 +92,7 @@
                 <div id="join-private" class="input-group input-group-sm">
                     <i class="fa fa-key input-group-addon" aria-hidden="true"></i>
                     <input [(ngModel)]="join_password" type="text" class="form-control" i18n-placeholder placeholder="在这输入你朋友的私密房间密码就可以进去了哦!">
-                    <span i18n class="input-group-btn"><button class="btn btn-secondary" type="button" (click)="join_private(join_password)">加入私密房间</button></span>
+                    <span class="input-group-btn"><button i18n class="btn btn-secondary" type="button" (click)="join_private(join_password)">加入私密房间</button></span>
                 </div>
             </div>
 
@@ -227,9 +227,7 @@
                                 <th class="mode">
                                     <!--<span i18n>游戏模式</span>-->
                                     <div id="watch-filter" class="dropdown">
-                                        <button i18n class="btn btn-secondary dropdown-toggle btn-sm" type="button" id="watchDropdownMenuButton" aria-haspopup="true" aria-expanded="false">
-                                            游戏模式
-                                        </button>
+                                        <button i18n class="btn btn-secondary dropdown-toggle btn-sm" type="button" id="watchDropdownMenuButton" aria-haspopup="true" aria-expanded="false">游戏模式</button>
                                         <div class="dropdown-menu">
                                             <h6 i18n class="dropdown-header">匹配</h6>
                                             <label i18n class="form-check dropdown-item">