(MAIN PAGE-HEADER) Add counter to the "favourites" icon and refactor styles.

[iakivpekarskyi]

1. Add counter to the "favourites" icon.

2. Change color and gap between the icon and name of a button.

3. Shift counter on the cart to the right and up.

4. Change the header's container height to 48px.
5. Add shadow to the container and button