Rename lessons for persons query

aleksis/apps/alsijil/frontend/components/coursebook/absences/absenceCreation.graphql

@@ -5,13 +5,13 @@ query persons {
   }
 }
 
-query lessonEventsForAbsences(
+query lessonsForPersons(
   $persons: [ID!]!
   $start: Date!
   $end: Date!
 ) {
-  items: lessonEventsForAbsences(
-    person: $persons
+  items: lessonsForPersons(
+    persons: $persons
     start: $start
     end: $end
   ) {

aleksis/apps/alsijil/schema/__init__.py

@@ -37,7 +37,7 @@ class Query(graphene.ObjectType):
     groups_by_person = FilterOrderList(GroupType, person=graphene.ID())
     courses_of_person = FilterOrderList(CourseType, person=graphene.ID())
 
-    lesson_events_for_absences = FilterOrderList(
+    lessons_for_persons = FilterOrderList(
         PersonAbsencesType??,
         persons=graphene.List(graphene.ID, required=True),
         start=graphene.Date(required=True),
@@ -123,7 +123,7 @@ class Query(graphene.ObjectType):
             | Q(groups__parent_groups__owners=person)
         )
 
-    def lesson_events_for_absences(
+    def lessons_for_persons(
         root,
         info,
         persons,