Use TriaStateCheckBox for language IsCurrent

Oqtane.Client/Modules/Admin/Languages/Index.razor

@@ -16,11 +16,13 @@ else
             <th style="width: 1px;">&nbsp;</th>
             <th>@Localizer["Name"]</th>
             <th>@Localizer["Code"]</th>
+            <th>@Localizer["Is Current"]</th>
         </Header>
         <Row>
             <td><ActionDialog Header="Delete Langauge" Message="@Localizer["Are You Sure You Wish To Delete The {0} Language?", context.Name]" Action="Delete" Security="SecurityAccessLevel.Admin" Class="btn btn-danger" OnClick="@(async () => await DeleteLanguage(context))" Disabled="@(context.IsCurrent)" ResourceKey="DeleteLanguage" /></td>
             <td>@context.Name</td>
             <td>@context.Code</td>
+            <td><TriStateCheckBox Value="@(context.IsCurrent)" Disabled="true"></TriStateCheckBox></td>
         </Row>
     </Pager>
 }