Apply width/height to hidden elements on resize when duration specified

[techfg]

Describe the bug
In #357, when resize is called with a duration specified, a fix was applied to filter the animation to only act on visible elements. In short, this would exclude altImages which is actually OK as they don't require height/width.

However, in the unlikely event that someone using IM is relying on those elements having an explicit height/width, need to ensure 100% backwards compat and apply the css to the hidden elements as well - it just shouldn't be done using animate to ensure that jQuery doesn't make those elements visible (the issue that #357 addressed).

To Reproduce
Steps to reproduce the behavior:

1. Open AltImages example
2. Execute $('img').mapster('resize', 1000, null, 25, null) in console
3. Inspect HTML and width/height will not be specified on altimages

Expected behavior
Ensure width/height is specified on altimages but that they remain display==='none'

Screenshots
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Smartphone (please complete the following information):
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Additional context
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