convert ip lookup copy anchor to button

app/assets/javascripts/discourse/templates/components/ip-lookup.hbs

@@ -8,14 +8,9 @@
   <div class="location-box">
     <a class="close pull-right" {{action "hide"}}>{{d-icon "times"}}</a>
     {{#if copied}}
-      <a class="btn btn-default btn-hover pull-right">
-        {{d-icon "copy"}}
-        {{i18n "ip_lookup.copied"}}
-      </a>
+      {{d-button class="btn-hover pull-right" icon="copy" label="ip_lookup.copied"}}
     {{else}}
-      <a class="btn btn-default pull-right no-text" {{action "copy"}}>
-        {{d-icon "copy"}}
-      </a>
+      {{d-button action=(action "copy") class="pull-right no-text" icon="copy"}}
     {{/if}}
     <h4>{{i18n "ip_lookup.title"}}</h4>
     <p class='powered-by'>{{{i18n "ip_lookup.powered_by"}}}</p>