fix importer/exporter i18n

src/components/exporter/exporter.js

@@ -15,18 +15,8 @@ const Exporter = {
       type: String,
       default: 'export.csv'
     },
-    exportButtonLabel: {
-      type: String,
-      default () {
-        return this.$t('exporter.export')
-      }
-    },
-    processingMessage: {
-      type: String,
-      default () {
-        return this.$t('exporter.processing')
-      }
-    }
+    exportButtonLabel: { type: String },
+    processingMessage: { type: String }
   },
   data () {
     return {

src/components/exporter/exporter.vue

@@ -7,14 +7,14 @@
         spin
       />
 
-      <span>{{ processingMessage }}</span>
+      <span>{{ processingMessage || $t('exporter.processing') }}</span>
     </div>
     <button
       v-else
       class="btn button-default"
       @click="process"
     >
-      {{ exportButtonLabel }}
+      {{ exportButtonLabel || $t('exporter.export') }}
     </button>
   </div>
 </template>