Previously the entire location map was being rebuilt and redrawn in onUpdate() during a drag operation, including the connectors which weren't changing. This was causing notable lag on some systems.
This splits the draw operations into two separate pieces - locations on the board which are unchanging, and locations which are being dragged. This allows only connections which are actually moving to be recalculated.
Since TTS only allows a single list of vector lines per object the dragged lines are now set on the cards themselves rather than the PlayArea. This may possibly improve performance in itself, by keeping each list of vectors smaller. Supporting this required some changes in how pre-built connections are handled.
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