ID 392484 - Dead lock on startup when a dialogue window for locating an image appears.

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Problem summary
Dead lock on startup when a dialogue window for locating an image appears. This occurs when a user's python module affecting the preset browser is installed.

Customer reported version
modo.12.2v1

Customer reported platform
windows10

Steps to reproduce
1) Install the users Python module.
2) Open a Modo scene with a missing texture link by double clicking the scene with Modo closed.

Expected behaviour
Modo should not enter a "dead lock."

Actual behaviour
Modo encounters a "dead lock" and becomes unusable.

Workaround
Unknown.

Reproduced by support
Logged at developers request/per reproduction case in remote session.

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