Changes

Fix XapiStatementEntityDao

The Xapi search query used Join XapiVerbEntity instead of left join. The XapiVerbEntity is only created when a verb has display properties.

This broke the query such that statements that used verbs that had no display properties would not be returned.

Fix XapiStatementEntityDao

The Xapi search query used Join XapiVerbEntity instead of left join. The XapiVerbEntity is only created when a verb has display properties.

This broke the query such that statements that used verbs that had no display properties would not be returned.

Fix XapiActorExt.distinctMerged function

DistinctMerged function was not handling identified groups correctly: the returned group member was not null even if it was null in the input. This caused the ActorDataSource to incorrectly remove all group members.

Fix mistake on XapiStatementEntityDao get assignment progress function: incorrect use of group.

Make assignment progress query test more rigorous.

Implement creation of an XapiGroup for students in a given class to enable assignments to work as expected.

Replaced showAddStudent, showAddTeacher, and showStudentGrouping with a single isAdminOrTeacher because all three were always set to the exact same value.

Refine log messages

Remove the app url argument from Learning Unit Detail screen. This should not be required.

Add GetXapiActivityForPublicationUseCase and related readme.

Refine log messages

Update assignment recipe example.

Add `STACK_COUNT` constant to `ClazzDetailViewModel` and use it to limit member display in `ClazzDetailScreen`.