Window fit zoom doesn't fit to 100% when scroll bar is shown

[Elypha]

System information

• Windows OS version: windows 11 22h2 x64
• ImageGlass version: 9.0.11.502
• ImageGlass release: Store / Classic? classic

To Reproduce

Steps to reproduce the behavior:

1. enable window fit zoom
2. select/enable auto zoom
3. enable scroll bar for gallery
4. open an image

Actual behavior

• for example, the image resolution is like 500x700 and is shown on a 4k screen
• when double click the image to open it
  • the initial zoom is randomly somewhere around 98% but not 100%
  • and there are extra margins on the sides
• disabling the scroll bar fixes it

Expected behavior

• the expected initial zoom should be exactly 100% if the image isn't too large to fit the screen

Screenshots / Video / Sample image file

https://github.com/d2phap/ImageGlass/assets/30290883/8c0a82ce-ad1e-4718-9d60-be523e1ea7e0

Additional context