Merge branch 'ptr-content' into 'develop'

Pullable: Remove pullingContent={undefined}

See merge request soapbox-pub/soapbox-fe!1659

app/soapbox/components/pullable.tsx

@@ -13,7 +13,6 @@ interface IPullable {
  */
 const Pullable: React.FC<IPullable> = ({ children }) =>(
   <PullToRefresh
-    pullingContent={undefined}
     // @ts-ignore
     refreshingContent={null}
   >