Added current view to wrangler menu titles.

Example:

    Score manager - stylesheet library

        1: baca-letter-14.ily (Bača)
        2: clean-letter-14.ily (Abjad)
        3: clean-letter-16.ily (Abjad)
        4: gebiete-miscellaneous.ily (Gebiete)
        5: meters.ily (Manifolds)
        6: red-example-score-stylesheet.ily (Red Example Score)
        7: rhythm-letter-16.ily (Abjad)
        8: time-signature-context.ily (Abjad)
        9: traiettorie-header.ily (Traiettorie inargentate)
        10: traiettorie-layout.ily (Traiettorie inargentate)
        11: traiettorie-miscellaneous.ily (Traiettorie inargentate)
        12: traiettorie-paper.ily (Traiettorie inargentate)

        stylesheets - copy (cp)
        stylesheets - new (new)
        stylesheets - remove (rm)
        stylesheets - rename (ren)

    > va

    Score manager - stylesheet library - select view to apply:

        1: flamingo
        2: chocolate

    > 1

    Score manager - stylesheet library (flamingo view)

        1: gebiete-miscellaneous.ily (Gebiete)
        2: meters.ily (Manifolds)
        3: traiettorie-header.ily (Traiettorie inargentate)

        stylesheets - copy (cp)
        stylesheets - new (new)
        stylesheets - remove (rm)
        stylesheets - rename (ren)

    > q