[BugFix] presize()

When presize() runs, if the <img> object has a width assigned via CSS of 100% of the area it is contained in,  the width will not necessarily match the actual width of the image being loaded. Therefore, it is better to rely on the dimensions of trueSize, if it is provided, to help resize the <img> object to fit in the boxWidth and boxHeight, if they are provided.