fix #19576 title frame to all parts in xml import file

[sammik]

Resolves: #19576

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• I created a unit test or vtest to verify the changes I made (if applicable)

[sammik]

I am bit confused of vtest fail, as only change in this PR is musicxml import, so it should be unrelated.

[cbjeukendrup]

Indeed it seems impossible that it is related to this PR. Probably some kind of race condition with another PR, or the PR branch is not up-to-date with latest master. Most likely a rebase will fix it.

[mike-spa]

Excellent, thank you!