Describe the bug
The Quick 3D Plot (slow) context menu option shows an empty widget

To Reproduce
Steps to reproduce the behavior:

1. Load P123_D2O_10_percent.dat
2. Right-click on file in Data Explorer and choose "Quick 3D Plot (slow)" from the context menu
3. See the window pop up with no content

Expected behavior
A 3D matplotlib representation of data should be visible

SasView version (please complete the following information):

• Version: 6.1.1 / main

Operating system (please complete the following information):

• OS: Windows 10

Installation method (please complete the following information):

• Installed: both installed and developer