Fixed "autogen doesn't generate patterns for all difficulties for some songs"
Fixed incorrect "show" value in "show!hold" being written in DWIs
Fixed "song ends early after adding an edit then playing"
WindowDancing and all its UI elements). All of the dancing UI elements
have been consolidated into the Player class, which simplifies things a
great deal. Steps and the classes that use them have been generalized
to use a variable number of panels (6 panel, 8 panel). Only a little more
work is needed on the ColorArrows portion of Player to fully support these
panel modes.