Add a hashtag public link to the trending hashtag page (#17140)

* Add a hashtag public link to the hashtag management page

* Add support for element 'target' to Counter.js.
Remove 'rel' element.

* Update app/javascript/mastodon/components/admin/Counter.js

Co-authored-by: Claire <claire.github-309c@sitedethib.com>

Co-authored-by: Eugen Rochko <eugen@zeonfederated.com>
Co-authored-by: Claire <claire.github-309c@sitedethib.com>

app/javascript/mastodon/components/admin/Counter.js

@@ -33,6 +33,7 @@ export default class Counter extends React.PureComponent {
     label: PropTypes.string.isRequired,
     href: PropTypes.string,
     params: PropTypes.object,
+    target: PropTypes.string,
   };
 
   state = {
@@ -54,7 +55,7 @@ export default class Counter extends React.PureComponent {
   }
 
   render () {
-    const { label, href } = this.props;
+    const { label, href, target } = this.props;
     const { loading, data } = this.state;
 
     let content;
@@ -100,7 +101,7 @@ export default class Counter extends React.PureComponent {
 
     if (href) {
       return (
-        <a href={href} className='sparkline'>
+        <a href={href} className='sparkline' target={target}>
           {inner}
         </a>
       );

app/views/admin/tags/show.html.haml

@@ -11,7 +11,7 @@
 
 .dashboard
   .dashboard__item
-    = react_admin_component :counter, measure: 'tag_accounts', start_at: @time_period.first, end_at: @time_period.last, params: { id: @tag.id }, label: t('admin.trends.tags.dashboard.tag_accounts_measure')
+    = react_admin_component :counter, measure: 'tag_accounts', start_at: @time_period.first, end_at: @time_period.last, params: { id: @tag.id }, label: t('admin.trends.tags.dashboard.tag_accounts_measure'), href: tag_url(@tag), target: '_blank'
   .dashboard__item
     = react_admin_component :counter, measure: 'tag_uses', start_at: @time_period.first, end_at: @time_period.last, params: { id: @tag.id }, label: t('admin.trends.tags.dashboard.tag_uses_measure')
   .dashboard__item