UX Proposition: make it so the "Import Cards" screen doesn't close the window if a selection drag ends on the outside area

{"ops":[{"insert":"Hello! \n\nCurrently, if we want to swap the whole decklist through the import list (say, when importing various sealed decks or re-importing a similar version of a deck) if the user drags the mouse to select the cards and the mouse movement ends within the outer area, the interface will automatically close without saving changes. Fixing that would be a nice user experience improvement, alas a rather specific one.\n\nImage with a visual explanation below:\n\n"},{"insert":{"image":"https://i.imgur.com/3Hz9xsN.png"}},{"insert":"\n"}]}