[UI] cannot unfold the experiment status bar after some time

[lesquoyb]

Describe the bug
I noticed that I'm often not able to open the experiment status bar to observe the different simulations running.
Sometimes it's right at the first simulation that I run, sometimes it's after a few runs. Once I cannot unfold the status bar on an experiment there's nothing I can do to be able to do it again, pausing the simulation or reloading do not work, killing it and running a different one etc. It is just broken until I reboot gama completely.

To Reproduce
Steps to reproduce the behavior:

1. Run a (batch ?) experiment and try to fold/unfold the status bar
2. maybe kill the experiment and load it again a few times?
3. See error

Expected behavior
The menu can be folded and unfolded all the time

Additional context
Happens on Windows and Linux

[AlexisDrogoul]

Any log ? It looks like a first error killed the menu.