Improve widget suggestion

[ajdapretnar]

What's wrong?

Widget suggestion functionality has been behaving very strangely of late. When I drag a line out from Test&Score, the proposal is I connect Nomogram, which should only appear after Logistic Regression or Naive Bayes. And where is Confusion Matrix, the most probable next widget to connect?

How can we reproduce the problem?

Fresh Orange, File, T&S, LR, drag a line out from T&S.

What's your environment?

• Operating system: OSX
• Orange version: 3.37.dev
• How you installed Orange: pip

[janezd]

Note: we will see whether we pre-initialize recommendations. If not, we should. If we do, we should do it better.

[processo]

I noticed it too some time ago. I think it's because Orange considers every possibility. The above example is valid because Test & Score has a Data Table output and Nomogram can receive one. (Even if it's useless because Test & Score does not allow row selection so the first one is used automatically.)