Find a better way of rendering the posts from the async relay fetch call

[PulkitVyasCynsar]

With #81 the user has to press a button that takes the time to render the posts. This is certainly not a good way of doing this and branle seems to handle this by adding the posts to the in memory database first so we can go for that route

[PulkitVyasCynsar]

Closing as migrated to https://github.com/muellners/second.exchange