Display a loading indicator while moving items

fixes #1006

src/components/MoveDialog.vue

@@ -1,6 +1,6 @@
 <template>
 	<Modal v-if="showModal" :title="title" @close="onClose">
-		<div class="move-dialog">
+		<div v-if="!moving" class="move-dialog">
 			<TreeFolder
 				:folder="{
 					title: t('bookmarks', 'Root folder'),
@@ -10,6 +10,7 @@
 				:show-children-default="true"
 				@select="onSelect" />
 		</div>
+		<div v-else class="icon-loading move-dialog" />
 	</Modal>
 </template>
 <script>
@@ -30,6 +31,9 @@ export default {
 		selection() {
 			return this.$store.state.selection
 		},
+		moving() {
+			return this.$store.state.loading.moveSelection
+		},
 		allFolders() {
 			return this.filterFolders(this.$store.state.folders)
 		},

src/store/index.js

@@ -29,6 +29,7 @@ export default new Store({
 			saveBookmark: false,
 			createFolder: false,
 			saveFolder: false,
+			moveSelection: false,
 		},
 		error: null,
 		notification: null,