[Odie] Send site_id and scroll to the beggining of the message.

[AllTerrainDeveloper]

Proposed Changes

This set of changes is fixing an issue where wpcom server can't infer the current site the user is navigating into. Another issue we are fixing within this patch is the ability to scroll to the beginning of the block, instead of to the end of the message when we receive a message from Wapuu

Testing Instructions

In order to test this change correctly you need to sandbox your wpcom public-api with the patch D142563.

1. Open a site with multiple blogs and different plans
2. Open Wapuu via flags (eg, ?flags=wapuu)
3. Add a logger in the wpcom patch, to log the plan the user is using. (eg, line 512 of the wpcom patch, l($plan);.)
4. Assert that the plan you are using matches the log
5. Change to a different site with a different plan
6. Assert the plan keeps matching the new site.
7. Assert that the question you receive is visible in the initial part of the message (ie, is not scrolled till the bottom of the message)

[github-actions]

Calypso Live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:commit-7408801a9d046caa95cfa985a606c35845620643

Jetpack Cloud live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:commit-7408801a9d046caa95cfa985a606c35845620643&env=jetpack

Automattic for Agencies live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:commit-7408801a9d046caa95cfa985a606c35845620643&env=a8c-for-agencies

[matticbot]

Here is how your PR affects size of JS and CSS bundles shipped to the user's browser:

Async-loaded Components (~27 bytes added 📈 [gzipped])

name                               parsed_size           gzip_size
async-load-automattic-help-center       +148 B  (+0.0%)      +27 B  (+0.0%)

React components that are loaded lazily, when a certain part of UI is displayed for the first time.

Legend

What is parsed and gzip size?

Parsed Size: Uncompressed size of the JS and CSS files. This much code needs to be parsed and stored in memory.
Gzip Size: Compressed size of the JS and CSS files. This much data needs to be downloaded over network.

Generated by performance advisor bot at iscalypsofastyet.com.

[sirino]

Works as expected, ship it!