Shouldn't get this key without enabling DISAMBIGUATE_ESCAPE_CODES in crossterm

[xlambein]

When I press shift and media play/pause ([57428;2u) on my keyboard, Helix crashes with the following message:

thread 'main' panicked at 'internal error: entered unreachable code: Shouldn't get this key without enabling DISAMBIGUATE_ESCAPE_CODES in crossterm', helix-view/src/keyboard.rs:158:40

which originates there:

helix/helix-view/src/keyboard.rs

Lines 158 to 160 in 590a628

	| CKeyCode::Modifier(_) => unreachable!(
	"Shouldn't get this key without enabling DISAMBIGUATE_ESCAPE_CODES in crossterm"
	),

I'm running Helix off master, more specifically 590a628460c8fa8a4e101541d67289fa2fac95b5.

My OS details are: Linux nixos 5.19.1 #1-NixOS SMP PREEMPT_DYNAMIC Thu Aug 11 11:22:05 UTC 2022 x86_64 GNU/Linux

[archseer]

#4125