made withLoadMore work... sorta

src/components/gallery/gallery.js

@@ -1,5 +1,5 @@
 import Attachment from '../attachment/attachment.vue'
-import { sumBy } from 'lodash'
+import { sumBy, set } from 'lodash'
 
 const Gallery = {
   props: [
@@ -85,7 +85,7 @@ const Gallery = {
   },
   methods: {
     onNaturalSizeLoad ({ id, width, height }) {
-      this.$set(this.sizes, id, { width, height })
+      set(this.sizes, id, { width, height })
     },
     rowStyle (row) {
       if (row.audio) {

src/components/tab_switcher/tab_switcher.jsx

@@ -43,14 +43,14 @@ export default {
   },
   data () {
     return {
-      active: findFirstUsable(this.$slots.default)
+      active: findFirstUsable(this.$slots.default())
     }
   },
   computed: {
     activeIndex () {
       // In case of controlled component
       if (this.activeTab) {
-        return this.$slots.default.findIndex(slot => this.activeTab === slot.key)
+        return this.$slots.default().findIndex(slot => this.activeTab === slot.key)
       } else {
         return this.active
       }
@@ -74,7 +74,7 @@ export default {
     },
     // DO NOT put it to computed, it doesn't work (caching?)
     slots () {
-      return this.$slots.default
+      return this.$slots.default()
     },
     setTab (index) {
       if (typeof this.onSwitch === 'function') {