Followup to b92993fceea107c6f1cbc04eac6008827a61a000
I ran out of time to get this working for that fix,
also here I am making the post.url method have parity
with post.shareUrl in JS, which omits the post number
for the first post.
Followup to c6cb3196718ba2dde8e799f5d9cdd999f3116d1f,
the actionCallback function was double-wrapped with () => {}
which meant that copyClipboard did not return a promise.
