Resolve "Frontend improvements"

Closes #116 (closed)

frontend/src/components/student_list/StudentList.vue

@@ -2,7 +2,7 @@
   <v-card>
     <v-card-title>
       <span class="title">
-        Students
+        Participants
       </span>
       <student-list-reverse-mapper class="ml-4"/>
       <v-spacer/>
@@ -53,8 +53,8 @@
                 <v-icon small v-if="!props.item.isActive">lock</v-icon>
                 <v-icon small v-else>lock_open</v-icon>
               </template>
-              <span v-if="!props.item.isActive">Student doesn't have access.</span>
-              <span v-else>Student has access.</span>
+              <span v-if="!props.item.isActive">Participant doesn't have access.</span>
+              <span v-else>Participant has access.</span>
             </v-tooltip>
           </td>
           <td