[Cuis] Minor Direction Padding

[Dan Norton]

Greetings,

Four LayoutSpec class methods use "minorDirectionPadding:" as a keyword. The parameter 
can be a number or one of: #top, #left, #center, #right, or #bottom. AFAICT when the 
parameter is a number, it refers to the padding which will be applied in the minor direction. 
When it is a symbol, it effectively specifies that morphs will be located as the symbol name 
implies.

Attached are four convenience methods whose keyword emphasizes the visible (morph) 
instead of the invisible (padding). The "morphPlacement:" parameter can be  #top, #left, 
#center, #right, or #bottom. The methods are:

LayoutSpec class>>fixedWidth:fixedHeight:morphPlacement:
LayoutSpec class>>fixedWidth:proportionalHeight:morphPlacement:
LayoutSpec class>>proportionalWidth:fixedHeight:morphPlacement:
LayoutSpec class>>proportionalWidth:proportionalHeight:morphPlacement:

Are these worth having in the base system?

 - Dan

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