Resolve "[Queue-2.0] Removing Labs"

What does this mr do?

Make sure the user gets directed to the correct pages when clicking the delete buttons for a lab.

Actions taken to fix bug

Does this MR meet the acceptance criteria?

• I have added a changelog entry to reflect the significant changes I made and the bug I fixed.
• A test was created to test the bug.
• I have updated the documentation accordingly.
• I adhere to the style guide. Closes #376 (closed)

src/main/java/nl/tudelft/queue/controller/EditionController.java

@@ -421,7 +421,9 @@ public class EditionController {
 		return View.convert(lr.findAllBySessions(
 				sessions.stream().filter(p)
 						.map(SessionDetailsDTO::getId)
-						.collect(Collectors.toList())),
+						.collect(Collectors.toList()))
+				.stream().filter(lab -> lab.getDeletedAt() == null)
+				.collect(Collectors.toList()),
 				LabSummaryDTO.class);
 	}
 }