Add missing conditional

assets/javascripts/wizard/templates/components/wizard-composer-editor.hbs

@@ -27,9 +27,11 @@
     hideBox=(action 'hideBox')}}
 {{/if}}
 
+{{#if isUploading}}
   <div id="file-uploading">
     {{loading-spinner size="small"}}<span>{{i18n "upload_selector.uploading"}} {{uploadProgress}}%</span>
     {{#if isCancellable}}
       <a href id="cancel-file-upload" {{action "cancelUpload"}}>{{d-icon "times"}}</a>
     {{/if}}
   </div>
+{{/if}}