🐛 Bug report | "Make default" option does not work for widgets

[stevenlabelle]

Description:
Using the "Make default" option does not permanently save new default options.

Version:
Dev Version 3.0.0.1e622434a

Steps To Reproduce:

1. Open a model on the post side.
2. Double click on a text widget (e.g., title, heatmap legend, etc.).
3. Change the font color.
4. Select "Make default" and click Apply then click OK.
5. Close then reopen the model.
6. The text will still be the original color.