fix(vmimport): Add missing list page for ovasource (#714)

... and several small improvements.

Signed-off-by: Volker Theile <vtheile@suse.com>

pkg/harvester/list/harvesterhci.io.migration.ovasource.vue

@@ -0,0 +1,60 @@
+<script>
+import ResourceTable from '@shell/components/ResourceTable';
+import Loading from '@shell/components/Loading';
+import { SCHEMA } from '@shell/config/types';
+import { HCI } from '../types';
+
+const schema = {
+  id:         HCI.VMIMPORT_SOURCE_OVA,
+  type:       SCHEMA,
+  attributes: {
+    kind:       HCI.VMIMPORT_SOURCE_OVA,
+    namespaced: true
+  },
+  metadata: { name: HCI.VMIMPORT_SOURCE_OVA },
+};
+
+export default {
+  name:         'HarvesterVMImportSourceOVA',
+  components:   { ResourceTable, Loading },
+  inheritAttrs: false,
+
+  async fetch() {
+    const inStore = this.$store.getters['currentProduct'].inStore;
+
+    this.rows = await this.$store.dispatch(`${ inStore }/findAll`, { type: HCI.VMIMPORT_SOURCE_OVA });
+
+    const configSchema = this.$store.getters[`${ inStore }/schemaFor`](HCI.VMIMPORT_SOURCE_OVA);
+
+    if (!configSchema?.collectionMethods.find((x) => x.toLowerCase() === 'post')) {
+      this.$store.dispatch('type-map/configureType', { match: HCI.VMIMPORT_SOURCE_OVA, isCreatable: false });
+    }
+  },
+
+  data() {
+    return { rows: [] };
+  },
+
+  computed: {
+    schema() {
+      return schema;
+    }
+  },
+
+  typeDisplay() {
+    return this.$store.getters['type-map/labelFor'](schema, 99);
+  }
+};
+</script>
+
+<template>
+  <Loading v-if="$fetchState.pending" />
+  <ResourceTable
+    v-else
+    v-bind="$attrs"
+    :groupable="true"
+    :schema="schema"
+    :rows="rows"
+    key-field="_key"
+  />
+</template>