automatically open namespace on intellisense completion breaks (frequently) in scripts

[smoothdeveloper]

In a script file:

#r "nuget: FSharp.Data"

let v = JsonV

results in :

Conservative fix would be to:

• check we are in a script
• check the last #r or #load directive based on insertion point
• apply the same logic as when we are not in a script, but from there only

Ideally, it would also consider which assembly or F# file it is picked from and put the open closer to it than what this logic proposes.