Changed (**) to (H) for 'home'.

MODEL: The menu is the same as before. But the command has changed to (H) to
baptize the area as the home screen.

Currently looks like this; capitalization and other text styling hasn't yet
been applied:

    Abjad IDE

        example materials:
           1: example articulation handler
           2: example dynamic handler
           3: example markup inventory
           4: example notes
           5: example numbers
           6: example pitch range inventory
           7: example sargasso measures
        example scores:
           8: blue example score
           9: etude example score
          10: red example score
        example stylesheets:
          11: clean-letter-14
          12: clean-letter-16
          13: rhythm-letter-16
          14: time-signature-context
        library: materials:
          15: baca numbers
          16: talea rhythm maker
        library: stylesheets:
          17: baca-letter-14
        scores:
          18: aracilik
          19: archipel
          20: betoerung
          21: cary
          22: chrysanthemums
          23: desir
          24: gebiete
          25: imaginaire
          26: lidercfeny
          27: mannigfaltigkeiten
          28: manos
          29: recursif
          30: red shift
          31: sekka
          32: tack
          33: territoires
          34: traiettorie
          35: zeit

    >

Note that this different than the start-up screen (which just lists all scores
and does have text styling applied):

    Abjad IDE - scores

       1: Aracılık (2014)
       2: Betörung (2012)
       3: Blue Example Score (2013)
       4: Čáry (2006)
       5: Chrysanthemums (1995)
       6: Étude Example Score (2013)
       7: Gebiete (2013)
       8: L'archipel du corps (2011)
       9: Las manos mágicas
      10: Lidércfény (2008)
      11: L'imaginare (2010)
      12: Manifolds (2013)
      13: Mon seul désir (2009)
      14: Poème récursif (2005)
      15: Red Example Score (2013)
      16: Red Shift Hijinks (2005)
      17: Sekka (2007)
      18: Tack (1996)
      19: Territoires
      20: Traiettorie inargentate (2013)
      21: Zeit (1998)

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

    >

This means that IDE starts at (S) rather rather than (H). And this probably
makes sense because a the higher-level view of (H) is probably required for
fewer realworld use cases.