Additional modes for Formula Scope

Whilst the current method for formula scope encompasses the existing options (Actual, All Versions, All Versions Except Actual and Current), there is sometimes a need for formula scope to be applicable to specific versions outside of this scope - For instance, side loading of a budget. Whilst Add Version Formula covers some of those problems, it comes with it's own caveats which aren't always possible to overcome.

It'd be much more flexible and easier to just implement additional formula scope options or allow for it to be driven using a setting like Current Version in the Versions list. This would mitigate the need for building additional logic steps to overcome this