Categories do not save within Widget Blueprints after compiling

If a variable is moved to a category outside of the default and then the user compiles the blueprint then the category will be erased and the variable will be put back in the category it was originally in.

1. Open Editor
2. Create a new Widget Blueprint
   Right Click in the Content browser > User interface > Widget Blueprint
3. Open Widget Blueprint
4. Drag a button into the Designer tab
5. Go to the event graph
6. Click on the button variable in the My Blueprint panel
7. Change the Category by typing in "AnythingElse"
8. Notice the variable is moved to the category "AnythingElse"
9. Compile
10. Notice the variable has been moved back to it's original category and the new category is gone