Adjustments for link card styling and animations

- Adjusted the styling of cards that was broken with multi-cards.
It could be perceived by the bottom border of the card getting
hidden by other elements.
This patchset makes the content fit inside the card.

- Transitions have been defined to make the interaction with cards
more fluent.
When the card behind is exposed, ad when swapping cards, 
a transition is used to make the movement more natural.

Change-Id: I1a198619e2b9de9e77489f066a93d47a8d7c88bd
Merge "Adjustments for link card styling and animations"