Improve memory usage of grill, related to captcha

[teodorus-nathaniel]

What I did:

• Move captcha so its now only rendered once everytime, instead of having multiple recaptcha instances for every CaptchaInvisible component displayed
• Remove unused fields from the posts data (from datahub & squid)
  Note: this change has a bit of drawback, which is if the original post content has tags or other removed fields, it won't be included in the updated post after updating the content, because the UI doesn't get that fields

[teodorus-nathaniel]

After checking result:

1. Multiple recaptcha instance doesn't seem to increase the memory usage
2. Reducing some fields in the posts doesn't decrease the memory usage significantly, if checked from network tab, 50 posts is 1mb so, reducing some fields won't decrease it much

Current:

After:

The number fluctuates but mostly its similar