Model rebind causes opened nodes to collapse

[evan-williams]

Hi @elbywan - love this component! It's been very useful.

One issue I have is when the model changes, any opened nodes automatically collapse. Ideally we'd like an option to keep all node's expanded/collapsed state when the model changes.

This may be an option already but I have not found it - we currently use these strategies:

:strategies="{
selection: ['single'],
click: ['select', 'unfold-on-selection'],
fold: ['opener-control']
}"