About [[Toolserver:Catdown-scaling-width/en]]

Needs plural support. Same for Toolserver:catdown-scaling-height/en, Toolserver:catdown-scaling-both/en.

• , scaled to a maximum width of $1 pixels
• , scaled to a maximum height of $1 pixels
• , scaled to a maximum size of $1x$2 pixels

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Quite a silly preference, but  Done for Catdown-scaling-width and Catdown-scaling-height. Not done for catdown-scaling-both as I don't see how could you make it agree tiwh the two numeric parameters (in any case, I also added parsemag for that call).