Add new custom GA events to demo

[apedroferreira]

New custom Google Analytics events for the Toolpad demo.
Closes #1535

The toolpad_app_created event already includes app_template_id, so it wasn't necessary to add anything new to know which template was used.

New events:

• toolpad_app_continue_latest
  Measures when user went to continue working on latest app. Includes app_id.

• toolpad_self_host_click
  Measures click on self-host link. Includes app_id and an additional parameter source that tells whether the user clicked the self-host link in the demo bar or the query panel (see screenshots).

• toolpad_roadmap_click
  Measures click on roadmap link in demo bar. Includes app_id.

• toolpad_schedule_demo_click
  Measures click on "schedule demo" link in demo bar. Includes app_id.

[Janpot]

• toolpad_self_host_click
• toolpad_roadmap_click
• toolpad_schedule_demo_click

Would it be more interesting to solve these with UTM parameters on the links? I feel like it could be more powerful.

[apedroferreira]

Would it be more interesting to solve these with UTM parameters on the links? I feel like it could be more powerful.

I don't know exactly how UTM parameters work, but if they send an event automatically by clicking a link it should be a good idea. I had the idea that they only worked if the target page has Google Analytics (in which case this would still work for the self-host button anyway).
I'll try that out and look more into UTM params.

[apedroferreira]

I've added UTM parameters to the links according to what I've read about how they should work, but I'm not sure how this replaces the usefulness of having custom events directly in Toolpad?

From what I've read, outbound clicks are tracked automatically with the click event, however in the GA dashboard it does not seem easy to view all click events distributed by which destination link they used.

And I guess that UTM params in links that lead to the Toolpad docs could be used to track where traffic came from - but having custom events in Toolpad's Analytics directly could be an easier way to view and analyze this data, and easier to integrate with funnel metrics and that kind of stuff if we wanted to?

[apedroferreira]

I've removed UTM params from the links to roadmap and scheduling demo.
Kept UTM params in the links to the Toolpad docs, just in case.
Will merge this tomorrow or a bit later if there's no more feedback!