fix: ensure full-height layout (openedx#1724)

When content within a sequence was shorter than the height of the browser viewport, the `.sequence-container > .outline-sidebar-wrapper` element does not expand appropriately.  This caused the course outline sidebar to be partially or completely hidden from view.

Author: wgu-jesse-stewart

package-lock.json

@@ -38,7 +38,7 @@
     "@edx/frontend-component-footer": "^14.6.0",
     "@edx/frontend-component-header": "^6.2.0",
     "@edx/frontend-lib-learning-assistant": "^2.20.0",
-    "@edx/frontend-lib-special-exams": "^3.5.0",
+    "@edx/frontend-lib-special-exams": "^4.0.0",
     "@edx/frontend-platform": "^8.3.1",
     "@edx/openedx-atlas": "^0.7.0",
     "@edx/react-unit-test-utils": "^4.0.0",