Entity Tree Collapsed by Default

[mrfelipemartins]

Is your feature request related to a problem? Please describe.
As pandora data gets larger, having the entity tree expanded by default becomes annoying since we need to either search or collapse everything manually.

Describe the solution you'd like
The entity tree should be collapsed by default.

Describe alternatives you've considered
If having the tree collapsed by default is not a good approach we could at least have a button to expand/collapse.

[bitbrain]

I am a big fan of a collapse/expand button! A way to "remember" somehow if a particular category is currently collapsed would be useful. When a user has everything collapsed except one category, re-opening Pandora should show the same result. The collapse/expand button just ensures that property gets changed accordingly everywhere.

Feel free to challenge me on this but I think by default, the tree should be expanded: when someone tries Pandora for the first time and they load a demo project, showing them all entities available to them makes sense.