Make post links more visible with new right gutter timeline

[mcwumbly (Dave McClure)]

I agree with @codinghorror from 2013:

The correct way to think of them is as incoming and outgoing links.

• If the arrow points ← toward the post, there is an incoming link to this post from another Discourse post in a different topic
• If the arrow points away → from the post, this post contains an outgoing link to another Discourse post in a different topic.

Maybe right-align the text so the arrow can point left and toward the post?