Fix typo in Related Posts module description
"effecting" -> "affecting"
Related Posts: Move bulk resync button to debugger page.

Related Posts is just one module that relies on synced data so move bulk
resync request UI to JP debugger page instead.
Related Posts Sync Button Tidying

Don’t break an existing translation string.

Don’t show the resync if we’re not connected.

General tidying following 0cfbf1e5f6533c19da8ee7790fa61a4297b889a8
For 3.0.x only, change it back to the misspelling

This is intentional so it doesn’t break provided translations. :\