SAK-41806 Lessons is not clearing the return url from session part 2 (#8407)
This same issue is also happening in ShowItemProducer
(cherry picked from commit 396063458b2c8f30184d4d0f0e4b184715d2e00c)
Conflicts:
lessonbuilder/tool/src/java/org/sakaiproject/lessonbuildertool/tool/producers/ShowItemProducer.java