[$30] Update post count

[jmgasper]

@atelomycterus - Topcoder has requested that the post count recently implemented be updated as follows:

1. Instead of separate post and comment counts, just sum those up into one value
2. Just use the suffix posts, like 1234 posts

[jmgasper]

Challenge https://www.topcoder.com/challenges/d4a7f028-a272-4664-816f-53505f988a81 has been created for this ticket.

This is an automated message for ghostar via Topcoder X

[jmgasper]

Challenge https://www.topcoder.com/challenges/d4a7f028-a272-4664-816f-53505f988a81 has been assigned to obog.

This is an automated message for ghostar via Topcoder X

[atelomycterus]

@jmgasper Please apply PR-#606, Thanks!

Testing