Narrator is toggled when typing in text fields

This is same problem as MC-117004, but in 1.14 snapshots.

Typing in text fields can toggle the narrator. This is especially problematic for keyboard layouts where Ctrl + B is used to write a different character, for example Czech, Slovak, Hungarian, Croatian, Slovenian, Serbian and a few other Slavic language keyboards where the way to type "{" is Ctrl + Alt + B, or Alt Gr + B.