Missing CSS optimization - TRBL sizes

[SpeednetGroup]

Please update the CSS optimizations in NUglify to reduce top, right, bottom, left (TRBL) declarations. margin is an example of a CSS declaration that uses TRBL.

• If all four values are the same, the you only use one value. For example, margin:10px 10px 10px 10px should be reduced to margin:10px
• If the top and bottom are different but the left and right are the same, you can reduce to three values. For example, margin:10px 5px 20px 5px should be reduced to margin:10px 5px 20px
• If the top and bottom are the same and the left and right are the same, you can reduce to two values. For example, margin:10px 5px 10px 5px should be reduced to margin:10px 5px

This optimization should apply to the following rules (although there may be others; it's been a while since I last checked):

• margin
• padding
• border-width
• border-style
• border-color
• border-radius