`AquaTableUI` drag and drop changes added `table.setSelectionBackground` and an infinite `repaint()` loop

[karlvr]

I have observed an infinite repaint loop in my app due to the code in AquaTableUI that (according to commit history) is related to drag and drop:

            if (!AquaColors.isPriority(table.getSelectionBackground())) {
                table.setSelectionBackground(null);
            }

and

            if (!AquaColors.isPriority(table.getSelectionBackground())) {
                Color c = AquaColors.CLEAR;
                if (isDropTarget) {
                    c = colors.getBackground(appearanceContext.withState(ACTIVE_DEFAULT).withSelected(true));
                } else if (isSelected) {
                    if (appearanceContext.getState() == ACTIVE_DEFAULT && isSelectionMuted) {
                        c = colors.getBackground(appearanceContext.withState(ACTIVE).withSelected(true));
                    } else {
                        c = colors.getBackground(appearanceContext.withSelected(true));
                    }
                }
                table.setSelectionBackground(c);
            }

This is because JTable.setSelectionBackground calls repaint(), and VAqua calls table.setSelectionBackground on every render.

I haven't found a good workaround for this yet. Perhaps we only need to change the selected background under some circumstances (in getRendererComponent), and we could only then undo it when necessary (in paintRenderedCell)?