+ store the card state in user settings
+ amend the BannerCard close button state. It needs to change color on hover and to become visible only when the card is hovered.
Banner items are created as per design.
Banner items support customizable close button.
Banner items have hove state as per design.
Banner items are added to storybook with all possible configurations.
Banner items have a close animation including fade-out and the remaining item occupy the empty space.
QML tests are added.