removed some custom functions in favor of Qt implementations

reworked the ring finder algorithm greatly, tries harder to find the optimal solution

Added last-resort ring draw with quads

Ring draw: maintain separate polygons for the ring circles and draw them separately of the ring fill to prevent artifact lines from being drawn

Removed the List -> QList alias, use QList directly

removed the List class in favor of QList

removed debug prints from the ring finder

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mercurial