Revert "Be specific about the style for suggested-action"

This reverts commit 9d80d64e36e09b8e3a555a10382fd33eab25701b.
Revert "Use the selection color for the suggested action on message dialogs"

This reverts commit ea030ea6dd29770d1c6ec4c36c0599fa6865404e.
Don't add a box shadow on the suggested button when linked