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.
 (commit: 81f3154)

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.
 (commit: 2e51e61)

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.
 (commit: 39869b4)

Fix mistake on XapiStatementEntityDao get assignment progress function: incorrect use of group.
 (commit: 04eeca8)

Make assignment progress query test more rigorous.
 (commit: b0a5249)

Implement creation of an XapiGroup for students in a given class to enable assignments to work as expected.
 (commit: 7f5e45c)

Replaced showAddStudent, showAddTeacher, and showStudentGrouping with a single isAdminOrTeacher because all three were always set to the exact same value.
 (commit: 2685c5b)

Refine log messages
 (commit: fc7d313)

Remove the app url argument from Learning Unit Detail screen. This should not be required.
 (commit: 5dfc66f)

Add GetXapiActivityForPublicationUseCase and related readme.
 (commit: 2be5b5d)

Refine log messages
 (commit: 06f7f39)

Update assignment recipe example.
 (commit: af3beb9)

Add `STACK_COUNT` constant to `ClazzDetailViewModel` and use it to limit member display in `ClazzDetailScreen`.
 (commit: 9bb25c6)