Replace retained element reference with a method #683
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This is start of a chain of refactorings with the goal to make the modal component and it's various states more comprehensible and easier to change.
While it should not be an issue, it may happen that a reference to the DOM element that represents the modal gets stuck in memory. Retrieving the element from DOM each time seems to make the garbage collector happier.
This method could and should be replaced by a regular getter once we shift this addon to native classes.