Possible to delete templates with children

[bergmania]

Which Umbraco version are you using? (Please write the exact version, example: 10.1.0)

V14 RC5

Bug summary

It is possible to delete (and I have the option in the client) a template that has children.

Specifics

No response

Steps to reproduce

1. Create a template
2. Create another template below the firstly created
3. Try to delete the template with children

Expected result / actual result

It should not be possible in the management api and I should not have the option in the client

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This item has been added to our backlog AB#44595

[leekelleher]

Fix for the frontend is available in PR: umbraco/Umbraco.CMS.Backoffice#2479.

[bergmania]

Fixed in #17539