[Glitch] Add aria-label to column regions

Port 66dbb59aa1 to glitch-soc

app/javascript/flavours/glitch/features/direct_timeline/index.js

@@ -80,7 +80,7 @@ export default class DirectTimeline extends React.PureComponent {
     const pinned = !!columnId;
 
     return (
-      <Column ref={this.setRef}>
+      <Column ref={this.setRef} label={intl.formatMessage(messages.title)}>
         <ColumnHeader
           icon='envelope'
           active={hasUnread}