Can we display two separate lines in buttonWidget's confirmMessage?

Neither of these is really directly possible.  There's a workaround where you could force the user to click the "submit" button twice in order to actually submit, showing a different warning message each time, though that's a lot of extra work for not much payoff (and probably increased user confusion).

Neither of these is really directly possible.  There's a workaround where you could force the user to click the "submit" button twice in order to actually submit, showing a different warning message each time, though that's a lot of extra work for not much payoff (and probably increased user confusion).