Move gon ref to the index to avoid depending on gon in any mr widget objects

app/assets/javascripts/vue_merge_request_widget/index.js

@@ -4,6 +4,8 @@ import {
 } from './dependencies';
 
 document.addEventListener('DOMContentLoaded', () => {
+  gl.mrWidgetData.gitlabLogo = gon.gitlab_logo;
+
   const vm = new Vue(mrWidgetOptions);
 
   window.gl.mrWidget = {

app/assets/javascripts/vue_merge_request_widget/stores/mr_widget_store.js

@@ -5,7 +5,7 @@ export default class MergeRequestStore {
 
   constructor(data) {
     this.sha = data.diff_head_sha;
-    this.gitlabLogo = gon.gitlab_logo;
+    this.gitlabLogo = data.gitlabLogo;
 
     this.setData(data);
   }