Update GitLab Pages to v0.4.3

Nick Thomas requested to merge (removed):pages-v0.4.3 into master

What does this MR do?

updates GitLab Pages to v0.4.3 - there is just a single bug fix between this and 0.4.2

Are there points in the code the reviewer needs to double check?

Why was this MR needed?

Release a bugfix in GitLab 9.3

Screenshots (if relevant)

Does this MR meet the acceptance criteria?

What are the relevant issue numbers?

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