Incorrect grid displays when using scroll wheel

[e543]

Describe the bug When using scroll wheel for zooming image, grid with a small cell width represents incorrect.

Steps to reproduce the behavior

1. Upload an image or create new.
2. Go to view menu.
3. Click on option show grid.
4. Choose default width.
5. Click on OK.
6. Scroll closer.
7. See incorrect grid.

Expected behavior Cell's width remains constant or scales with scrolling

Screenshots

Desktop

• OS: Windows
• Version:1.6.6