fix 23187: Change UI in prefrences for exporting musicxml

[KuribohG]

No description provided.

[Jojo-Schmitz]

Did you already sign the CLA and if is so under what name?

[KuribohG]

Did you already sign the CLA and if is so under what name?

Yes. Here's my info:
Full name: Yuheng Zou
E-Mail: zouyuheng1998@gmail.com

[KuribohG]

Are these tests exactly correct?
I think the options for the test is not correct. In the old UI, we don't allow users export breaks without exporting layouts. However, in the test, PREF_EXPORT_MUSICXML_EXPORTLAYOUT is false and PREF_EXPORT_MUSICXML_EXPORTBREAKS is MANUAL. So in the new UI, this settings should print informations of manually created breaks. That's why some new lines are printed in the test.
In the old version, we must export layouts when we export breaks, so these lines were hidden when PREF_EXPORT_MUSICXML_EXPORTLAYOUT is false.
I tested this on a manually created score. The new code in exportxml.cpp worked fine, but the old code didn't work.

[Jojo-Schmitz]

then it seems the *-ref.* files need to get adjusted

[lvinken]

Looks good ! Almost (but not completely) OK: the system-layout should only be printed if "export all layouts" is true.

Obviously, the autotester should also pass. I would prefer to run the autotester with "do not export breaks" (as this isolates it from precise layout details) en remove "print new-system" and print new-page" from the files in mtest/musicxml/io.

[KuribohG]

I have fixed this. Now it passed the tests, and I also tested it on some files manually.

I'm very sorry that I wrongly deleted the original fork repo. I must start a new pull request to merge this fix so I close this one.