Esc button crashes gui if event viewer is open

[larsevj]

What happened? (You can include a screenshot if it helps explain)

If you happen to press ESC when the event viewer or the export data windows is open, the gui crashes with the following error message:

Traceback (most recent call last):
  File "/data/komodo_dev/ert/src/ert/gui/ertwidgets/closabledialog.py", line 52, in keyPressEvent
    self._close_button.isEnabled()
    ^^^^^^^^^^^^^^^^^^
AttributeError: 'ClosableDialog' object has no attribute '_close_button'. Did you mean: 'close_button'?
Aborted (core dumped)

What did you expect to happen?

I would expect the event viewer window to close or nothing to happen at all.

steps to reproduce

ert gui poly.ert
open up event viewer window
Press ESC

Environment where bug has been observed

• python 3.8
• python 3.9
• python 3.10
• python 3.11
• python 3.12
• macosx
• rhel7
• rhel8
• local queue
• lsf queue
• slurm queue
• openPBS queue
• used flag --enable-scheduler

[larsevj]

Also present on upcoming stable 2024.08.00.