Fix file attachement area in Wiki page editing form

src/main/twirl/gitbucket/core/helper/attached.scala.html

@@ -1,10 +1,11 @@
-@(owner: String, repository: String)(textarea: Html)(implicit context: gitbucket.core.controller.Context)
+@(owner: String, repository: String, generateScript: Boolean = true)(textarea: Html)(implicit context: gitbucket.core.controller.Context)
 @import context._
 @import gitbucket.core.util.FileUtil
 <div class="muted attachable">
   @textarea
   <div class="clickable">Attach images or documents by dragging &amp; dropping, or selecting them.</div>
 </div>
+@if(generateScript){
 @defining("(id=\")([\\w\\-]*)(\")".r.findFirstMatchIn(textarea.body).map(_.group(2))){ textareaId =>
 <script>
 $(function(){
@@ -30,3 +31,4 @@ $(function(){
 });
 </script>
 }
+}

src/main/twirl/gitbucket/core/helper/preview.scala.html

@@ -28,11 +28,7 @@
           @if(style.nonEmpty){ style="@style"}
           @if(styleClass.nonEmpty){ class="@styleClass" }>@content</textarea>
       }
-      @if(enableWikiLink){
-        @textarea
-      } else {
-        @helper.html.attached(repository.owner, repository.name)(textarea)
-      }
+      @helper.html.attached(repository.owner, repository.name, enableWikiLink)(textarea)
     </div>
     <div class="tab-pane" id="tab@(uid+1)">
       <div class="markdown-body" id="preview-area@uid">

src/main/twirl/gitbucket/core/wiki/edit.scala.html

@@ -30,7 +30,6 @@
           placeholder        = "",
           uid                = 1
         )
-        <div class="clickable">Attach images or documents by dragging &amp; dropping, or selecting them.</div>
       </div>
       <div class="form-group">
         <label for="message">Edit Message</label>