Function _moveEdge

docs/app/js/sanddance-app.js:31799–31804

* Moves the edge of a rectangle to the value given. It only moves the edge in a linear direction based on that edge. * For example, if it's a bottom edge it will only change y coordinates.

(rect, edge, newValue)

 * Moves the edge of a rectangle to the value given. It only moves the edge in a linear direction based on that edge.
 * For example, if it's a bottom edge it will only change y coordinates.
 */ function _moveEdge(rect, edge, newValue) {
    var difference = _getEdgeValue(rect, edge) - newValue;
    rect = _setEdgeValue(rect, edge, newValue);
    rect = _setEdgeValue(rect, edge * -1, _getEdgeValue(rect, edge * -1) - difference);
    return rect;
}
/**
 * Aligns the edge on the passed in rect to the target. If there is a gap then it will have that space between the two.
 */ function _alignEdges(rect, target, edge, gap) {