Repaired statistics page layout

frontend/src/pages/Statistics.vue

 <template>
-  <div>
-    <v-row
-
-      class="ma-2"
-    >
-      <v-col cols="5">
+  <v-container>
+    <v-row>
+      <v-col>
         <label-statistics />
       </v-col>
-      <v-col
-        offset="1"
-        cols="5"
-      >
+      <v-col>
         <correction-statistics />
       </v-col>
     </v-row>
-  </div>
+  </v-container>
 </template>
 
 <script lang="ts">