[BUG] Nuke freezes when creating a modal window.

[sisoe24]

When sending code that creates a modal window, Nuke freezes completely.

To Reproduce

1. Send this code to NukeServerSocket

user = nuke.Panel('my panel')
user.addEnumerationPulldown('chooser', 'one two three')
user.show()

NukeServerSocket: 0.4.0
PySide2: 5.12.2
PySide2.QtCore: 5.12.2
Machine: macOS 10.15
Branch: 0.4.0
Python: 3.7.7

[sisoe24]

This is a Nuke problem since the freeze can be replicated inside the script editor when calling the nuke.executeInMainThread function.

def foo():
    user = nuke.Panel('my panel')
    user.addEnumerationPulldown('chooser', 'one two three')
    user.show()

nuke.executeInMainThread(foo)

With NukeServerSocket 0.4.1, switching the Code Execution Engine in the settings tab to Script Editor will not create any freeze.