fix add button

src/views/ShoppingList.vue

@@ -22,15 +22,14 @@ const tabs = [
           <ItemList :items="store.boughtItems"></ItemList>
         </v-window-item>
       </v-window>
-    </v-container>
-    <v-card-text style="position: absolute; right: 0;">
       <v-btn
         icon="mdi-plus"
         color="red"
         to="/add-item"
         elevation="8"
         size="large"
+        style="position: absolute; right: 1rem; bottom: 1rem;"
       />
-    </v-card-text>
+    </v-container>
   </DefaultPage>
 </template>