Implement stack and card reordering

Signed-off-by: Julius Härtl <jus@bitgrid.net>

lib/Service/CardService.php

@@ -400,6 +400,11 @@ class CardService {
 		if ($this->boardService->isArchived($this->cardMapper, $id)) {
 			throw new StatusException('Operation not allowed. This board is archived.');
 		}
+
+		$card = $this->cardMapper->find($id);
+		$card->setStackId($stackId);
+		$this->cardMapper->update($card);
+
 		$cards = $this->cardMapper->findAll($stackId);
 		$result = [];
 		$i = 0;