Revamp UI for efficient editing

[Muthaias]

Currently the UI is not very efficient when it comes to creating cards.

• It's hard to keep a good overview of existing cards when working with a single card
• Selecting things from dropdowns is not very efficient
• Too many clicks in general

One idea is to structure the editor as an advanced excel sheet, showing the data of a card on a single row using smart text-boxes to secure the input.