Import friction with cards not in database

When trying to import a deck from the clipboard, if one of the cards does not exist, then the import fails completely forcing you to remove cards by a single line item each time until no more cards are listed that are not inside the database.

Instead, it should either allow you to create the deck with only the cards that are available and notify which cards were not able to be imported because they do not exist (or were misspelt).

The error should contain all cards that are unable to be imported at once, instead of by a single line item each time or as many as possible.