Add ability to middle-mouse click posts in web UI (#32988)

app/javascript/mastodon/components/status_content.jsx

@@ -204,8 +204,8 @@ class StatusContent extends PureComponent {
       element = element.parentNode;
     }
 
-    if (deltaX + deltaY < 5 && e.button === 0 && this.props.onClick) {
-      this.props.onClick();
+    if (deltaX + deltaY < 5 && (e.button === 0 || e.button === 1) && this.props.onClick) {
+      this.props.onClick(e);
     }
 
     this.startXY = null;