Use Math.ceil() when computing a modalbox's position.
Review Request #6162 — Created July 28, 2014 and submitted
modalBox would listen for updates to the content within the box and
attempt to update its size and position accordingly. These values could
end up being non-integers, causing elements to subtly jump.To fix this, we just need to use Math.ceil() on the values to ensure
that we get whole numbers.
Saw this issue in a modalBox I had built. Some small updates would just
cause the box's contents to shift just a bit. That no longer happens
after this change.