[Cmake] Default optimisation settings in CMake for MSVC

[Ian Scott]

Is there a reason why the default settings on CMake Release and
RelwithDebInfo have the inline function expansion setting at  "Only
__inline"  rather than "Any Suitable /Ob2"

I know I can change it on my own machine, and I know the current setting
gives more control to the code author, but surely the optimiser is better at
making these decisions that most humans are?

Ian.