Resolve "Add simple course book list"

Closes #256 (closed) Closes #63 (closed)

Screenshots

Frontend todos

• Uhrzeit so wie im Mockup
  • Rechtsbuendig @ZugBahnHof
• Kasten nicht höher als input-feld
• fach und subject strukturierter nebeneinander
• Kursnamen irgendwie hervorheben
• datum gleiche einrückung wie das datum
• datum sollte überschrift sein und prominenter gestaltet
• datum braucht Wochentag
• mittlere spalte linksaligned
• Indikator ob Stundenthema richtig gespeichert wurde (@yuha )
  • when hovering over icon & success: show some fancy success message
  • when hovering over icon & error: show error message
• verify that changes are being tracked using revisions (using a mixin in core creating revisions when mutating) (blocked by AlekSIS-Core!1433 (merged))
• Remove outer card
• Move search, group select, ... into an app bar (see also this)
• Bottom sheet for date select should not be full width of screen (@yuha )
• Statusicon am Anfang der Zeile fehlt (#63 (closed) explains the different stati)

aleksis/apps/alsijil/schema/__init__.py

+from django.db.models.query_utils import Q
+
 import graphene
 from graphene_django import DjangoObjectType
 
-from django.db.models.query_utils import Q
-
 from aleksis.core.schema.base import DjangoFilterMixin, FilterOrderList
 
 from ..models import Documentation, Participation
 from .documentation import (
-    DocumentationType,
-    DocumentationCreateMutation,
     DocumentationBatchCreateMutation,
+    DocumentationBatchPatchMutation,
+    DocumentationCreateMutation,
     DocumentationDeleteMutation,
-    DocumentationBatchPatchMutation
+    DocumentationType,
 )
 
 
 class Query(graphene.ObjectType):
     documentations = FilterOrderList(DocumentationType)
-    documentations_by_course_id = FilterOrderList(DocumentationType, course_id=graphene.ID(required=True))
+    documentations_by_course_id = FilterOrderList(
+        DocumentationType, course_id=graphene.ID(required=True)
+    )
 
     def resolve_documentations_by_course_id(root, info, course_id, **kwargs):
-        documentations = Documentation.objects.filter(Q(course__pk=course_id) | Q(lesson_event__course__pk=course_id))
+        documentations = Documentation.objects.filter(
+            Q(course__pk=course_id) | Q(lesson_event__course__pk=course_id)
+        )
         return documentations