Make it possible to tag functions as ignorable

[Keno]

No description provided.

[ihnorton]

I'm not sure if this is exactly what you meant by this issue, but I find myself wanting to be able to ignore some intermediate functions when stepping up and down the stack, namely jl_apply, jl_apply_generic and friends. Those were formerly useful with gdb when they were the only way to get locals, but now they are mostly annoying. 🏆

[Keno]

Yes, navigating only julia frames is on the to do list. The cause of this issue was a request to be able to set certain functions as to-be-ignored when stepping in.