This improves on the original implementation: #1690.

• Remove the use of MediaQueryListEvent, which isn't supported by Safari until v14. The callback parameter differs depending on browser support. Without MediaQueryListEvent support MediaQueryList is passed (spec). So we instead just clone the MediaQueryList into the closure.
• Use accurate scale factors in the media query instead of approximating with min/max, which should avoid any further issues as discussed in Fixes rust-windowing/winit#2597 for good #2747 (comment).
• Always initialize media queries. They should always work unless something is seriously wrong with our code.

Reverts #2599.
Replaces #2747 as discussed in #2747 (comment).