Always min-width should win over max-width.
https://bugs.webkit.org/show_bug.cgi?id=198032

Reviewed by Darin Adler.

In the spec, https://www.w3.org/TR/CSS21/visudet.html#min-max-widths,
the following algorithm describes how the two properties influence
the used value of the 'width' property.

1. The tentative used width is calculated (without 'min-width' and 'max-width')
following the rules under "Calculating widths and margins" above.
2. If the tentative used width is greater than 'max-width',
the rules above are applied again, but this time using the computed value of 'max-width'
as the computed value for 'width'.
3. If the resulting width is smaller than 'min-width', the rules above are applied again,
but this time using the value of 'min-width' as the computed value for 'width'.