When Qt's extended command selection dialog is set for all commands
or all normal mode commands, it displays the "#wait" command as
"wait (rest)". Picking by mouse is straightforward; the extra text
on the button has no effect. Picking by typing "#wa" will choose it;
there aren't any other choices matching that so the player never gets
as far as typing 'i'. This change allows the player to type "#rest"
as an alternate way to choose it. "#re" matches some other stuff
and the choice is left pending, adding 's' makes it unique but not
explicitly chosen (so still possible to back up), then adding 't'
chooses it. The core never knows the difference.
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