Keyboard shortcut for showing flipside of card

**Is your feature request related to a problem? Please describe.**
When I'm in the Deck Editor and want to see the backside of a card, I have to move my mouse so I avoid that other cards are shown in the preview.

**Describe the solution you'd like**
I didn't see an setting for a keyboard shortcut in the preferences, so I'd like there to be one that would work both in the Deck Editor and while playing the game. So that the preview flips the card that was last hovered over.