feat: suitable copy

templates/repo/datasets/dataset_list.tmpl

@@ -15,7 +15,7 @@
       </div>
 
       <div class="one wide column">
-        <span class="ui text center" data-tooltip='{{$.i18n.Tr "dataset.copy_url"}}' data-position="bottom right">{{svg "octicon-file" 16}}</span>
+        <span class="ui text center clipboard"  data-clipboard-text="{{.DownloadURL}}" data-tooltip='{{$.i18n.Tr "dataset.copy_url"}}' data-clipboard-action="copy">{{svg "octicon-file" 16}}</span>
       </div>
 
       {{if $.Permission.CanWrite $.UnitTypeDatasets}}