v10.4.0

Features
ui-modal: modify modal to support less strict children (40f8ca2)

Bug Fixes
ui-calendar: fix duplicate dates for certain timezones (f9181aa)
ui-date-input: fix messages prop sometimes not populating in DateInput2 (28d2601)
docs app: Fix screenreaders incorrectly annoucing header elements as main landmark

Other
ui-progress,ui-side-nav-bar,ui-form-field: improve examples accessibility (2160fdd)
..and some more functional React examples