Add title to assignment view

Also, make route changes work smoothly

client/src/graphql/gql/assignmentWithSubmissionsQuery.gql

@@ -1,5 +1,6 @@
-query Submissions($id: ID!) {
+query AssignmentWithSubmissions($id: ID!) {
   assignment(id: $id) {
+    title
     submissions {
       id
       text

client/src/pages/submissions.vue

@@ -1,9 +1,9 @@
 <template>
   <div class="submissions-page">
-    <h1 class="submissions-page__title">Auftrag 2 - Aufgabe Interview</h1>
+    <h1 class="submissions-page__title">{{assignment.title}}</h1>
 
     <student-submission class="submissions-page__submission"
-                        v-for="(submission, index) in submissions"
+                        v-for="(submission, index) in assignment.submissions"
                         :key="index"
                         :submission="submission"
     >
@@ -15,7 +15,7 @@
 <script>
   import StudentSubmission from '@/components/StudentSubmission';
 
-  import SUBMISSIONS_QUERY from '@/graphql/gql/submissionsQuery.gql';
+  import ASSIGNMENT_WITH_SUBMISSIONS_QUERY from '@/graphql/gql/assignmentWithSubmissionsQuery.gql';
 
   export default {
     components: {
@@ -23,14 +23,16 @@
     },
 
     apollo: {
-      submissions() {
+      assignment() {
         return {
-          query: SUBMISSIONS_QUERY,
+          query: ASSIGNMENT_WITH_SUBMISSIONS_QUERY,
-          variables: {
+          variables() {
-            id: this.$route.params.id
+            return {
+              id: this.$route.params.id
+            }
           },
           update(result) {
-            return result.assignment.submissions;
+            return result.assignment;
           }
         }
       },