Content type builder always remove "autoPopulate" options in models

[karnadii]

Describe the bug
Content type builder always remove "autoPopulate" options in models

Steps to reproduce the behavior

1. create many to many relationship with 2 models
2. edit model setting to disable autoPopulate by adding "autoPopulate": false
3. add some field in one of model using content type builder. and save it.
4. see the different using git diff

-    "chapters": {
-      "collection": "chapter",
-      "via": "novel",
-      "autoPopulate": false
-    },


+    "chapters": {
+      "collection": "chapter",
+      "via": "novel"
+    },

Expected behavior
dont remove edited custom model while using content type builder

Screenshots
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Code snippets
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System

• Node.js version: v12.9.1
• NPM version: 6.10.2
• Strapi version: 3.0.0-beta.16.1
• Database: mongodb
• Operating system: ubuntu

Additional context
Add any other context about the problem here.

[lauriejim]

Hello, thank you for reporting this issue. We are currently on another feature and bug fix. Since time is lacking on our side, feel free investigate and submit a PR, we’ll appreciate your contribution on this issue!

Check out the contributing guide to get started: https://github.com/strapi/strapi/blob/master/CONTRIBUTING.md

I suggest you check how the plugin content-type-builder work to let you fix this issue.
Thank you for your time.

[meinvolk]

I will look into this one.