feature/476 fix: undefined selectedTab

[emekauja]

fix for Error "undefined selectedTab should not happen" using enableDeleteWhenEmpty false as seen in #340

[SimaoBolota-MetaCell]

@emekauja

In the Visualize section of PsyNeuLinkView, the '+' icons and the tabs are not displayed, so I can't really test the fix properly.
If the user hovers over it seems like the elements are there, but not visible.
An example is provided below

Screen.Recording.2023-03-10.at.16.37.34.mov

To compare, using the development branch of geppetto-meta allows me to see the tabs and icons and move them around

Screen.Recording.2023-03-10.at.16.29.08.mov

[SimaoBolota-MetaCell]

@emekauja I tried what you suggested, adding the lines of code from this commit manually into development and running the application from there.

And the same is happening. The elements in the Visualize section are not visible.

If I go back to the original development version, the elements in the Visualize section appear as visible

cc @enicolasgomez @ddelpiano

[emekauja]

I looked at this extensively and think we can skip this to the next release while i schedule a time to fix and look over this fix again, because if what we currently have in psyneulink is working as expected we should be able to skip till next release