[dialog] Feature request: user-configurable hot keys for items

[Cristian Rigamonti]

Hi, at the moment hot keys for list items are automatically generated taking
the first letter of the item tag; it would be useful if the user could
optionally override this and choose the hot key for each tag.

For example using the syntax used in PO files when translating software,
prepending an underscore to the desired hot key:

  dialog ... --radiolist "text" 10 50 10 Tag1 Item1 on T_ag2 Item2 off

Item1 would have "t" as a hotkey (default behaviour), Item2 would have "a"
(and of course "__" could be used to print a literal underscore).

Cri

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