Add custom title for confirm modal dialog

Resolves MS-521

client/src/components/modals/Confirm.vue

@@ -5,7 +5,7 @@
   >
     <template #header>
       <h3 class="confirm-dialog__heading">
-        Bestätigung
+        {{ title }}
       </h3>
     </template>
     <p class="confirm-dialog__content">
@@ -39,6 +39,12 @@
       Modal
     },
 
+    computed: {
+      title() {
+        return this.$modal.state.payload.title || "Bestätigung";
+      }
+    },
+
     methods: {
       confirm() {
         this.$modal.confirm();

client/src/components/modules/SnapshotListItem.vue

@@ -114,7 +114,9 @@
           .catch();
       },
       deleteSnapshot() {
-        this.$modal.open('confirm')
+        this.$modal.open('confirm', {
+            title: 'Snapshot löschen'
+          })
           .then(() => {
             this.$apollo.mutate({
               mutation: DELETE_SNAPSHOT_MUTATION,
@@ -154,7 +156,7 @@
               },
             });
           })
-          .catch();
+          .catch(() => {});
       },
       share() {
         this.$apollo.mutate({