Image rescaling with maxwidth and maxheight disrespects aspect ratio

When using maxwidth and maxheight, the exported image will have the indicated width and height, instead of respecting the aspect ratio and rescale to the first max value.

${Images[n].Image|maxwidth=350|maxheight=500}

If it's wanted to rescale without respecting the aspect ratio, a new notation should be used, as:

${Images[n].Image|width=300|height=300}