KDHUDElement: move Position, MARGIN, and code now separated as the calculate_position method here from KDStatMeter, also refactoring KDToolSight for the same. KDHUDElement::Image: add symbolic option to its ParameterConfig.
KDToolSight: add tool_sight_when_remote parameter.
KDHUDElement: remove inheritance from Script; have its descendants inherit separately from Script.