Moved UI to client folder to fix HMR

app/imports/client/ui/properties/treeNodeViews/ReferenceTreeNode.vue

@@ -0,0 +1,33 @@
+<template lang="html">
+  <div class="layout align-center justify-start">
+    <property-icon
+      v-if="!hideIcon"
+      class="mr-2"
+      :model="model"
+      :color="model.color"
+      :class="selected && 'primary--text'"
+    />
+    <tree-node-view
+      v-if="model.cache && model.cache.node && model.cache.node.type !== 'reference'"
+      :model="model.cache.node"
+    />
+    <div
+      v-else
+      class="text-no-wrap text-truncate"
+    >
+      {{ model.cache.node && model.cache.node.name || title }}
+    </div>
+  </div>
+</template>
+
+<script lang="js">
+import treeNodeViewMixin from '/imports/client/ui/properties/treeNodeViews/treeNodeViewMixin.js';
+
+export default {
+  name: 'ReferenceTreeNode',
+  mixins: [treeNodeViewMixin],
+  beforeCreate () {
+    this.$options.components.TreeNodeView = require('/imports/client/ui/properties/treeNodeViews/TreeNodeView.vue').default
+  },
+}
+</script>