The option to set the "Maximum text length" of a text box question has vanished, as we see only a "Input Box Length" when editing questions. New text box questions allow arbitrary length answers only.

Some implications of this:

1. The Input box length help indicates the existence of the missing option.
2. On restore from previous versions where there was a text length set, that setting remains on restore but cannot be changed in the UI. (The length is stored in the "precise" column of the question table, with 0 meaning infinite.)