Collection object conversion

[jon-vfb]

Have you read a contributing guide?

• [X] I have read CONTRIBUTING.md
• [X] I have searched the existing issues and didn't find any that were similar
• [X] I have considered creating a pull request with fixes instead of a bug report and want to proceed

Current Behavior

If I create a collection I have the ability to change that object type into another different object, this results in the loss of that collection relationships (or least a small chaos). A collection should not be able to be turned into a different type of object, or at least I should be able to lock the object type to avoid a user-side error resulting in that loss of relationships.

Expected Behavior

A collection should not be able to be turned into another type of object (Ex: Page)

Steps To Reproduce

1. Create a collection
2. turn the object type to a page
3. this results in the loss of the collection and its relationships

Environment

- OS: Windows 11
- Version: 0.40.9

Anything else?

No response

[jon-vfb]

the same goes for sets. Sets and collections should not be mutable. A set/collection should not be able to be converted into any other object type since, once done, the linking work is gone.