Wait for DOMContentLoaded before initializing cactbot overlays
Wait for DOMContentLoaded before initializing cactbot overlays

This used to happen prior to ngld OverlayPlugin integration into
cactbot.  This previously was only mostly working due to the race
working out correctly.  Now that the unlock text is trying to
access the DOM inside of the initialization routine, wait for
DOMContentLoaded before processing the response for cactbotLoadUser.

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