Describe the problem: what do you get? what do you expect?

A red DNU appears within the inspector when selecting an item + the lower part of the
panel is blurry

How to reproduce the problem: step by step if necessary

Open the MoosePanel
Create a mooseModel from ST code for example choosing Asm-Jit packages
select the model
select the model classes
browse a class in inspector
in the lower panel type "self allDeclaredProperties" and click on ctrl + G
select an item

Additional information: platform, context which may impact the problem
 Moose 5.1 (version 1003)
Linux

Please fill in the labels with the following information:
* Type-Defect,
* Component-XXX