revert(ImagePreview): do not move dom end of body (#7060)

* refactor: 撤销元素移动防止报错

* chore: bump version 9.12.1

Author: ArgoZhang

src/BootstrapBlazor/BootstrapBlazor.csproj

@@ -1,11 +1,11 @@
 <Project Sdk="Microsoft.NET.Sdk.Razor">
 
   <PropertyGroup Condition="'$(VisualStudioVersion)' == '17.0'">
-    <Version>9.12.1-beta02</Version>
+    <Version>9.12.1</Version>
   </PropertyGroup>
 
   <PropertyGroup Condition="'$(VisualStudioVersion)' == '18.0'">
-    <Version>10.0.0-rc.2.2.2</Version>
+    <Version>10.0.0-rc.2.2.3</Version>
   </PropertyGroup>
 
   <ItemGroup>

src/BootstrapBlazor/Components/ImagePreviewer/ImagePreviewer.razor.js

@@ -12,8 +12,6 @@ export function init(id, prevList, config) {
         viewer: Viewer.init(el, prevList, config)
     };
     Data.set(id, viewer);
-
-    document.body.appendChild(el);
 }
 
 export function update(id, prevList) {
@@ -32,6 +30,5 @@ export function dispose(id) {
 
     if (viewer) {
         Viewer.dispose(viewer.viewer);
-        viewer.el.remove();
     }
 }