Allow 1.1 values for aria-haspopup in 1.0 pattern

[carmacleod]

The Combobox pattern says:

In a combobox implementing the ARIA 1.1 pattern:

• If the combobox popup has a role other than listbox, the element with role combobox has aria-haspopup set to a value that corresponds to the popup type. That is, aria-haspopup is set to grid, tree, or dialog.

In a combobox implementing the ARIA 1.0 pattern:

• the element with role combobox has a value for aria-haspopup of listbox. Note that elements with role combobox have an implicit aria-haspopup value of listbox.

This implies that a 1.0 combobox cannot have, for example, aria-haspopup="dialog", but the spec does not restrict the value of aria-haspopup for 1.0 comboboxes.

[mcking65]

Closing because this is no longer necessary; we changed combobox for APG 1.2 so it has only 1 pattern for combobox.