Set firstload removal timer when .firstload gets added
Set firstload removal timer when .firstload gets added

The .firstload removal timer was being set for 1000ms after the page
load began, regardless of how long it would take to load the new page,
so if the page load took any significant time, .firstload would be
removed before the “fade in and up” effect could be completed. Move
this so that the timer starts once the page actually loads

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