[BRLTTY] BRLTTY moving the braille window without being asked to

[Sébastien Hinderer]

Hello,

I think I finally figured out where my problem comes from: I
accidentally enabled the "track-screen-scroll" preference. Disabling it
brings back the behaviour I am used to.

What I don't know, though, is whether the current behaviour of the
preference is the expected one or whether it has unexpected behaviours
which would deserve to be fixed.

Best wishes,

Sébastien.