Modal.method() please add a 'footer' property to toggle the show of footer

[Serkey]

• I have searched the issues of this repository and believe that this is not a duplicate.

What problem does this feature solve?

when adding a simple modal, I choose to use Modal.method(), but it means the modal always show the footer, but sometimes I don't want it, so add a footer property to the Modal.method() object parameter to control the show of the footer

What does the proposed API look like?

Modal.confirm() will show the footer
Modal.confirm({footer: null}) will hide the footer

[afc163]

#29749 (comment)