tiny js fix for 'show more' button in chrome (#3045)

app/javascript/mastodon/components/status_content.js

@@ -68,7 +68,7 @@ class StatusContent extends React.PureComponent {
     const [ startX, startY ] = this.startXY;
     const [ deltaX, deltaY ] = [Math.abs(e.clientX - startX), Math.abs(e.clientY - startY)];
 
-    if (e.target.localName === 'button' || e.target.localName === 'a' || (e.target.parentNode && e.target.parentNode.localName === 'a')) {
+    if (e.target.localName === 'button' || e.target.localName === 'span' || e.target.localName === 'a' || (e.target.parentNode && e.target.parentNode.localName === 'a')) {
       return;
     }