micro ops

[willmcgugan]

I few micro-optimizations for layout.

These do reduce readability, but this is critical code in vertical layouts.

This could be done to the horizontal layouts -- but it does tend to be the vertical layouts which have a tonne of widgets.

• Replace max() with equivalent ternary operator, sometimes with a walrus operator
• Replaced a few int(fraction) with fraction.__init__()
• Pulled Fraction in to local scope