Support of time signature for tactus

Your idea

Akin to issue #23897, support the option of adding special time signatures for tactus major, tactus minor, tactus proportionatus major and tactus proportionatus minor, used in modern mensural notation. See the description on Wikipedia of the modern notation of the tactus: https://nl.wikipedia.org/wiki/Tactus_%28muziek%29

Problem to be solved

Right now, a workaround is needed to create the time signatures for tactus in modern notation: change the appearance of the time signature with nominal numerator "1", "2" or "3" and an empty denominator; then add a whole note or quarter note from the master palette and place it under the numerator.

It would be helpful if in the Time signature properties dialog, for the appearance the denominator it’s also possible to select a whole note, quarter note or whole dotted note, with stems pointing downwards.

Prior art

No response

Additional context

In different Dutch church hymnals this notation is used, especially for the melodies from the Genevan Psalter and other 16th and 17th century melodies, but also for modern, 20th century compositions. See for example Liedboek. Zingen en bidden in huis en kerk (Boekencentrum, Zoetermeer, 2013), which was typeset with Lilypond, and Gezangen voor Liturgie (Gooi en Sticht, Baarn, 1996).

Checklist

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