Hide floating action button on thread views (#6859)

app/javascript/mastodon/features/ui/components/columns_area.js

@@ -28,6 +28,8 @@ const componentMap = {
   'LIST': ListTimeline,
 };
 
+const shouldHideFAB = path => path.match(/^\/statuses\//);
+
 @component => injectIntl(component, { withRef: true })
 export default class ColumnsArea extends ImmutablePureComponent {
 
@@ -153,7 +155,7 @@ export default class ColumnsArea extends ImmutablePureComponent {
     this.pendingIndex = null;
 
     if (singleColumn) {
-      const floatingActionButton = this.context.router.history.location.pathname === '/statuses/new' ? null : <Link key='floating-action-button' to='/statuses/new' className='floating-action-button'><i className='fa fa-pencil' /></Link>;
+      const floatingActionButton = shouldHideFAB(this.context.router.history.location.pathname) ? null : <Link key='floating-action-button' to='/statuses/new' className='floating-action-button'><i className='fa fa-pencil' /></Link>;
 
       return columnIndex !== -1 ? [
         <ReactSwipeableViews key='content' index={columnIndex} onChangeIndex={this.handleSwipe} onTransitionEnd={this.handleAnimationEnd} animateTransitions={shouldAnimate} springConfig={{ duration: '400ms', delay: '0s', easeFunction: 'ease' }} style={{ height: '100%' }}>