Fix #8264 - Do not override ctrl/cmd+click. (#8265)

This includes clicks on hashtags, mentions, display names and media in the
timeline; and usernames in reply-indicator, detailed status, and the boost
modal.

app/javascript/mastodon/components/media_gallery.js

@@ -50,7 +50,7 @@ class Item extends React.PureComponent {
   handleClick = (e) => {
     const { index, onClick } = this.props;
 
-    if (e.button === 0) {
+    if (e.button === 0 && !(e.ctrlKey || e.metaKey)) {
       e.preventDefault();
       onClick(index);
     }