Scrolling to zoom the camera in tracking mode does not work in some cases.

[Zemanzo]

Expected behavior
When using the mousewheel in the viewport whilst the camera is in tracking mode, it should zoom in (or out) on the currently tracked marble.

Actual behavior
When using the mousewheel in the viewport whilst the camera is in tracking mode, it does not zoom. This is because the DeltaY value is way too big since it does not take the DeltaMode into account. Read more here: https://developer.mozilla.org/en-US/docs/Web/API/WheelEvent/deltaY

Reproduction steps

1. Just scroll the damn thing I basically explained it above already.

Platform
OS: Windows 10
Browser version: Firefox Developer Edition (93.0b5 (64-bit))
Build version: 1.3.1 (latest /dev branch)

[Zemanzo]

Might be a duplicate of #267