[For 1.6] Advanced Sidebox 2.1.1

[Wildcard]

well display is not cut & dried as the plugin stands, if someone does not get 'Header Search Text' or 'Footer Search Text' right in the definition you get no side boxes...

Again you are misunderstanding me. When I say 'visibility' I mean 'selecting where and when a side box will be displayed'-- what you are talking about is script management.

if you leave one of the above blank you get the following error

That is an error and needs to be fixed. I'll make an issue on GitHub.

is making the acp look good failing the functionality ?

What does this even mean? I think that if I cannot add this feature in a way that is both functional and intuitive then I will not add it. Failing to ensure that would be irresponsible of me.