Keysigs on section break

[sammik]

Resolves: #25168

• On section break add key signatures, and mark them "forSectionBreak".
• When removing section break, remove "for section break" signatures.
• If signature already there, it is preserved (not marked "for section break" and not removed on section break deletion.
• New signatures added to section break are also not marked as "for section break", so not removed on section break deletion.

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[sammik]

Im just thinking, if this is not somehow overcomplicated.

May be simply adding key sig (and clef and timesig) always, when adding section break.

End when removing section break, we could leve them there.
(Or we could remove them, if they are same as preceding ones).

[Jojo-Schmitz]

A section break basically starts a new piece, so should start like the very 1st measure of a score, Clef, time- and key signature, as per the staff settings (which can disable them), but without courtesies.
If those would be marked as 'generated', they'd vanish on section break removal I'd guess?

[sammik]

If those would be marked as 'generated', they'd vanish on section break removal I'd guess?

I think, mark them as "generated" is semantically incorrect.
And I think, it wouldnt work anyway, as I think, begining each system has "generated" signs, and they change themselves, if signature changes before them. Am I wrong?

[sammik]

Doesnt work in parts.
Ill fix it.

[sammik]

@mike-spa it should be done

I needed to make some changes, sorry, please check, if it could be this way.

Now, it always acts in masterscore, to be sure, key signatures are added / removed into / from all staves.