Brush width and feather are affected by undo/redo

[MrStevns]

Issue Summary

Sometimes when you draw or erase on the canvas, the brush width and feather value changes.
It's not clear how it happens yet but here's a clip of it happening to a user.

bug2.mp4

Actual Results

The brush value and feather value changes seemingly randomly

Expected Results

The brush width and feather value does not change

Steps to reproduce

I haven't been able to reproduce it consistenly, although the issue seem to appear with a combination of strokes and undo/redo

1. Draw several strokes on the canvas
2. Undo a stroke and draw again

System Information

• Pencil2D Version: 0.7.0
• Windows 10
• Tablet: Yes but unknown brand