[2.15.0] La numérotation des rimes ne redémarre plus à chaque strophe

• 2.15.0 — New "Rimes continues entre strophes" toggle in the Syllabes tab: by default each
  stanza's rhyme lettering (A, B, C...) restarts at A, which meant a sonnet's tercets always
  came out as AAB/AAB instead of the conventional CCD/EED continuing on from the quatrains'
  ABBA/ABBA. Toggling it on shares the lettering across the whole poem instead — now on by
  default, alongside "Couleurs de rimes" (previously off by default). Also reworked the
  Syllabes toolbar: the display toggles are now pill-style buttons (matching the Hasard tab's
  look), and Export/Copy/Clear moved to a compact icon row above the draft box.