API board creation allowed without title

[tcassaert]

Describe the bug
When creating a board via the API, it is possible to create one, without providing a title, with an empty string. This is not possible in the UI.

To Reproduce
Steps to reproduce the behavior:

1. Make a Post request with an empty title
2. Board got created, with a blank title

Expected behavior
I'd expect an error, when there is an empty string provided

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[stefan-niedermann]

@juliushaertl can you please explain this a little more?

I saw <length>255</length> and const TITLE_MAX_LENGTH = 100;. Did the max title length change or not? If yes: Beginning with which version? (Also: The title max length should be documented in the REST-API since the message max length is also documented there to be 1000).