[Glitch] Show media modal on public pages

Port ff7941e652 to glitch-soc

app/javascript/flavours/glitch/components/media_gallery.js

@@ -33,10 +33,6 @@ const messages = defineMessages({
 
 class Item extends React.PureComponent {
 
-  static contextTypes = {
-    router: PropTypes.object,
-  };
-
   static propTypes = {
     attachment: ImmutablePropTypes.map.isRequired,
     standalone: PropTypes.bool,
@@ -73,7 +69,7 @@ class Item extends React.PureComponent {
   handleClick = (e) => {
     const { index, onClick } = this.props;
 
-    if (this.context.router && e.button === 0) {
+    if (e.button === 0) {
       e.preventDefault();
       onClick(index);
     }