unset .container-lg settings for editor

src/client/styles/scss/_mixins.scss

@@ -27,6 +27,12 @@
     height: calc(100vh - #{$editor-margin-top});
     margin-top: 0px !important;
 
+    .container-lg {
+      max-width: unset;
+      padding: 0;
+      margin: 0;
+    }
+
     &,
     .content-main,
     .tab-content {