[BRLTTY] Backspace (dot7) and Enter (dot8) on Fedora 33

[Frans-WIllem Post]

Hello all,

Thanks to Alexander on this list, I now have my braille display up and 
running under Fedora 33. The only thing that does not work (compared to 
my previous experience under Debian 10), is this:

- Braille input dot7 should act as a "backspace" keypress
- Braille input dot8 should act as an "enter" keypress

The physical input keys are OK; they work when I'm in BrlTTY's 
preferences menu and need to return (dot8). They work as expected 
(backspace and enter) on the system's TTY-consoles, too.

The rest of the Perkins-style input works in the GUI, as soon as I start 
xbrlapi.

Can someone help me get these two keys going in the GUI?

Thanks,
Frans-Willem Post

-- 
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