[Glitch] Rewrite <LoadPending /> as FC and TS

Port dfaf59d99a to glitch-soc

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

app/javascript/flavours/glitch/components/scrollable_list.jsx

@@ -16,7 +16,7 @@ import IntersectionObserverWrapper from 'flavours/glitch/features/ui/util/inters
 import { attachFullscreenListener, detachFullscreenListener, isFullscreen } from '../features/ui/util/fullscreen';
 
 import { LoadMore } from './load_more';
-import LoadPending from './load_pending';
+import { LoadPending } from './load_pending';
 import LoadingIndicator from './loading_indicator';
 
 const MOUSE_IDLE_DELAY = 300;