Item: clean up the content projection

[brandyscarney]

The content projection has been pretty confusing. I've updated the API docs to try to explain it better, but it is still confusing that if an ion-label exists it will ignore any other elements but if no ion-label is passed it will place it inside of the ion-label. Discuss! 😉

Forum discussion: https://forum.ionicframework.com/t/confused-about-ion-item-usage/54116/

[brandyscarney]

I know the point of this was so that users could write a simple item like:

<ion-item>
  my item
</ion-item>

and they wouldn't have to wrap it in an ion-label, but I think this is causing more confusion than writing more markup would.

[xr0master]

I think if you add examples from the forum topic in the API item documentation, it will be enough. IMO

[jgw96]

This issue is related: #6861

[brandyscarney]

I'm going to close this issue because the documentation has been updated for item to reflect where the content is projected. For more information on the current state of being able to nest components with content projection, see this comment: #12252 (comment)

[ionitron-bot]

Thanks for the issue! This issue is being locked to prevent comments that are not relevant to the original issue. If this is still an issue with the latest version of Ionic, please create a new issue and ensure the template is fully filled out.