improve validation of gdd send amount input field

frontend/src/views/Pages/AccountOverview.vue

@@ -97,7 +97,7 @@ export default {
   methods: {
     setTransaction(data) {
       data.target_date = new Date(Date.now()).toISOString()
-      this.transactionData = { ...data }
+      this.transactionData = data
       this.currentTransactionStep = 1
     },
     async sendTransaction() {

frontend/src/views/Pages/AccountOverview/GddSend/TransactionForm.vue

@@ -52,9 +52,9 @@
               <validation-provider
                 :name="$t('form.amount')"
                 :rules="{
-                  required: true,
-                  double: [2, $i18n.locale === 'de' ? ',' : '.'],
-                  between: [0.01, balance],
+                       required: true,
+                       numeric: true,
+                       between: [0.01, balance],
                 }"
                 v-slot="{ errors }"
               >
@@ -80,6 +80,8 @@
                     type="number"
                     :lang="$i18n.locale"
                     :placeholder="$n(0.01)"
+                    min="0.01"
+                    :max="balance"
                     step="0.01"
                     style="font-size: xx-large; padding-left: 20px"
                   ></b-form-input>