save buildings at change

index.html

@@ -168,11 +168,11 @@
                     <template v-for="building in buildings" v-if="building.amountPerLevel || building.intervalPerLevel || building.pricePerLevel">
                         <h3><strong>{{ building.name }}</strong></h3>
                         Amout per Level:<br/>
-                        <input class="form-control form-control-sandbox" type="text" v-for="amount in building.amountPerLevel" :value="amount"><br/>
+                        <input class="form-control form-control-sandbox" type="text" v-for="amount in building.amountPerLevel" @change="saveBuildingsToStorage()" :value="amount"><br/>
                         Interval per Level:<br/>
-                        <input class="form-control form-control-sandbox" type="text" v-for="interval in building.intervalPerLevel" :value="interval"><br/>
+                        <input class="form-control form-control-sandbox" type="text" v-for="interval in building.intervalPerLevel" @change="saveBuildingsToStorage()" :value="interval"><br/>
                         Price per Level:<br/>
-                        <input class="form-control form-control-sandbox" type="text" v-for="price in building.pricePerLevel" :value="price"><br/>
+                        <input class="form-control form-control-sandbox" type="text" v-for="price in building.pricePerLevel" @change="saveBuildingsToStorage()" :value="price"><br/>
                         <hr/><br/>
                     </template>
                 </div>