Updated to UE 4.20.#13

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roidanton wants to merge 3 commits intogetsetgames:4.15from

roidanton:master

Commits on Sep 14, 2018

Merge branch '4.15'

Richard Hähne
authored and
Richard Hähne
committed
Updated to UE 4.20.

Richard Hähne
authored and
Richard Hähne
committed

Commits on Feb 2, 2019

Added abstraction level to viewport client.
roidanton
committed