38650 Allow independent theming of Persistent and Modal bottom sheets

38709 [Material] Add contentPadding property to SwitchListTile

38726 Make disabled buttons/chips/text fields not be focusable.

38813 Add ToggleButtons.textStyle property

38831 [Material] Add clip property to bottom sheet and theme

38898 ToggleButtons test improvement

39144 Add the textAlignVertical param to TextFormField

39156 Added Scaffold.extendBodyBehindAppBar

39299 Add showAboutDialog sample

39333 Allow independent theming of Persistent and Modal bottom sheets Background Color

39433 Add helperMaxLines to InputDecoration and InputDecorationTheme