Communities: Loading About & Featured Posts

When the posts are loading, the about text & featured posts aren't loaded properly.
Create a loading animation (similar to the loading posts animation) for this seaction.

Start at the Communities screen and locate the existing loading-posts animation referenced in the issue. Compare how the About text and featured posts are handled while posts load, then verify that both areas show an appropriate loading animation until their content is ready.

Written by the indexing model from the issue text.