Hide veto button for confirmed reimbursements

app/components/reimbursement-item/component.js

@@ -10,6 +10,18 @@ export default class ReimbursementItemComponent extends Component {
     return config.ipfs.gatewayUrl;
   }
 
+  get isConfirmed () {
+    return (this.args.reimbursement.confirmedAt - this.kredits.currentBlock) <= 0;
+  }
+
+  get isUnconfirmed () {
+    return !this.isConfirmed;
+  }
+
+  get showVetoButton () {
+    return this.isUnconfirmed && this.kredits.currentUserIsCore;
+  }
+
   @action
   veto (id) {
     this.kredits.vetoReimbursement(id).then(transaction => {

app/components/reimbursement-item/template.hbs

@@ -24,7 +24,7 @@
          class="button small" target="_blank" rel="noopener noreferrer">
         Inspect IPFS data
       </a>
-      {{#if this.kredits.currentUserIsCore}}
+      {{#if this.showVetoButton}}
         <button {{on "click" (fn this.veto @reimbursement.id)}}
                 disabled={{@reimbursement.vetoed}}
                 class="button small danger" type="button">veto</button>