Merge remote-tracking branch 'origin/master' into v4.0
Conflicts:
lams_central/src/java/org/lamsfoundation/lams/authoring/ObjectExtractor.java
lams_learning/src/java/org/lamsfoundation/lams/learning/web/controller/GateController.java
lams_tool_scratchie/src/java/org/lamsfoundation/lams/tool/scratchie/dto/GroupSummary.java
lams_tool_scratchie/src/java/org/lamsfoundation/lams/tool/scratchie/service/ScratchieServiceImpl.java