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e5817c7004
Modern-day browsers abide the standardized wheel event (typed `WheelEvent`), however to support older browsers the legacy `DOMMouseScroll` (FireFox) and `mousewheel` (all others) events are also being registered. However modern browsers support both the modern event as well as the legacy, which results in the wheel handler being registered multiple times. This results in the wheel handler firing twice instead of once, causing excessive scrolling. This change separates the event registration such that either the modern or the legacy events are registered, and not both.