[CSS] Align breadcrumbs and date picker with latest USWDS style guide

[plutonik-a]

CSS enhancements for date picker and breadcrumbs
New breadcrumb design -> https://designsystem.digital.gov/components/breadcrumb
Date Picker Range -> https://designsystem.digital.gov/components/form-controls/#date-range-picker
Date Picker -> https://designsystem.digital.gov/components/form-controls/#date-picker