Node selection after loading a proof

[unp1]

Description

Loading an open proof selects the root node instead of an open goal.
I am not sure if that may be intended behavior, because one can be of course the
opinion that this is the better way.

In any case, for teaching I sometimes load proofs that have just one branch open and before that branch would be
directly selected, which makes the workflow a bit easier.

In any case, if the change was intended, please close the bug with won't fix.

Reproducible

always

Steps to reproduce

Describe the steps needed to reproduce the issue.

1. Save an open proof (with on goal open)
2. Load the proof
3. Root is selected after loading

My expectation would be that the open goal is selected.

Additional information

Add more details here. In particular: if you have a stacktrace, put it here.

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• Commit: 05635af

[FliegendeWurst]

I agree that selecting an open goal is more useful than selecting the root node. Don't know why it was changed.
I think the fix would be a call to mediator.getSelectionModel().defaultSelection() after loading the proof.

[wadoon]

There is an advantage to choose the the root goal initially. On large proofs (highly nested, many nodes), rendering the proof tree takes seconds if you select a nested node.

[unp1]

Wondering. When saving a proof, we could also store that last selected node (if available) and after loading select this node? So that should be done carefully to not introduce GUI dependencies in ProofSaver

[unp1]

I submitted PR #3324 for discussion. It adds the mentioned feature.