Additional modifiers and toggles in beta

[Marcel Schneider via CLDR-Users]

The PRI #367-related “Additional modifiers and toggles” are currently in beta:

https://unicode.org/cldr/trac/ticket/10851#comment:9

Various prototypes are desirable for testing. A “US-qwerty with additions” has 
proposed charts now up-to-date (with tooltips) and is about to be implemented 
for Windows and macOS:

http://charupdate.info/doc/kbenintu/

Any feedback will be welcomed, e.g. about:
• what characters are expected to be most easily accessed;
• whether CapsLock and Programmer toggle should be inverted; 
• mapping of the Numbers modifier (proposed on Left Alt);
• additionally remapping Backspace for convenience or not.

The linked page shall be completed once both implementations are released.

Regards,

Marcel