Resolve "Course filter approved requests broken"

What does this mr do?

Read Desc of issue.

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 #557 (closed)

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

@@ -46,6 +46,7 @@ import nl.tudelft.queue.repository.LabRequestRepository;
 import nl.tudelft.queue.service.*;
 
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.data.domain.PageImpl;
 import org.springframework.data.domain.Pageable;
 import org.springframework.data.domain.Sort;
 import org.springframework.data.web.PageableDefault;
@@ -144,10 +145,16 @@ public class RequestController {
 				.map(qs -> (Lab) qs)
 				.collect(Collectors.toList());
 
+		List<LabRequest> filteredRequests = rs
+				.filterRequestsSharedEditionCheck(lrr.findAllByFilter(labs, filter, pageable).getContent(),
+						assistant);
+
+		var requestsViews = rts.convertRequestsToView(
+				new PageImpl<>(filteredRequests, pageable, filteredRequests.size()), filteredRequests.size());
+
 		model.addAttribute("page", "requests");
 		model.addAttribute("filter", filter);
-		model.addAttribute("requests", rts.convertRequestsToView(
-				lrr.findAllByFilter(labs, filter, pageable), lrr.countByFilter(labs, filter)));
+		model.addAttribute("requests", requestsViews);
 		model.addAttribute("requestCounts", rts.labRequestCounts(
 				labs, assistant, filter));