fix: fixed Learner Post filter issue (#651)

* fix: fixed Learner Post filter issue

* refactor: removed different  variable declaration

---------

Co-authored-by: Awais Ansari <79941147+awais-ansari@users.noreply.github.com>

src/discussions/learners/learner-post-filter-bar/LearnerPostFilterBar.jsx

@@ -7,6 +7,7 @@ import { useParams } from 'react-router-dom';
 import { sendTrackEvent } from '@edx/frontend-platform/analytics';
 
 import FilterBar from '../../../components/FilterBar';
+import { PostsStatusFilter, ThreadType } from '../../../data/constants';
 import { selectCourseCohorts } from '../../cohorts/data/selectors';
 import { fetchCourseCohorts } from '../../cohorts/data/thunks';
 import { selectUserHasModerationPrivileges, selectUserIsGroupTa } from '../../data/selectors';
@@ -58,10 +59,16 @@ const LearnerPostFilterBar = () => {
       }
     } else if (name === 'status') {
       if (postFilter.status !== value) {
+        const postType = (value === PostsStatusFilter.UNANSWERED && ThreadType.QUESTION)
+        || (value === PostsStatusFilter.UNRESPONDED && ThreadType.DISCUSSION)
+        || postFilter.postType;
+
         dispatch(setPostFilter({
           ...postFilter,
+          postType,
           status: value,
         }));
+
         filterContentEventProperties.statusFilter = value;
       }
     } else if (name === 'orderBy') {