functions only eligible for heuristic argument detection at call-sites not UI visible

[psifertex]

When functions have certain low-confidence behaviors (such as the behavior when shown below from issue #3910)

they are subject to only low-confidence heuristics for parameter detection at each call site.

Current workarounds include:

• Providing user-confidence function type ("Y" on the function types and pressing enter will do this, as shown below)
  
• Using the override-call-type and specifying the same type information

This issue is tracking just the ability to see visually that this is happening in specific functions, likely with some sort of UI banner much like unresolved stack-usage so the user can make an informed choice about the correct function type.