Support the new Google analytics gtag.js

[davidfischer]

• This applies to docs and to the dashboard
• This is backwards compatible with the old UA-XXX properties assuming nothing custom is going on
• Supports the new G-XXXX properties
• Continues to support disabling analytics and do not track
• Sends custom dimensions like before
• Shorter cookie expiry like before

Fixes #7662

Testing

The easiest way to test this is to set settings.GLOBAL_ANALYTICS_CODE and rebuild some documentation and/or view the dashboard and verify that GA is loaded and data is sent (the collect call in the screenshot). There should be another call when clicking the flyout menu.

Note that I didn't build the static files as part of this PR so you'll need to run npm run build to do that. I will do that right before merging this to avoid conflicts.

[ericholscher]

Not an issue here, but I did see "global_analytics_code": "None" in my testing prior to setting the variable. Not gonna be an issue for us in prod, but probably worth fixing at some point.

[ericholscher]

This looks 💯 in my testing. I tested the dashboard and the in-doc pageviews and events. I think we're good to ship it.

[stsewd]

I was able to see this as well. Had to use chromium bc my firefox was blocking everything :D. I have rebuilt the static assets

[JuanDCG]

With "global_analytics_code": "G-XXXXXX" it is now working for me.

Thank you!

[sachin-suresh-rapyuta]

With "global_analytics_code": "G-XXXXXX" it is now working for me.

Thank you!

@JuanDCG - I am at the step where I just added my ReadtheDocs website URL to Google Analytics Web stream, where I have my G-ID now. I pasted this ID in ReadtheDocs admin's Analytics code field.

1. Can you please let me know the next steps?
2. Is installing Google tag mandatory?

[JuanDCG]

With "global_analytics_code": "G-XXXXXX" it is now working for me.
Thank you!

@JuanDCG - I am at the step where I just added my ReadtheDocs website URL to Google Analytics Web stream, where I have my G-ID now. I pasted this ID in ReadtheDocs admin's Analytics code field.

1. Can you please let me know the next steps?

2. Is installing Google tag mandatory?

Sorry, It was 2 years ago and nowadays I can't help you.