Scope / histogram exposure scroll direction reversed

Is there an existing issue for this?

• I checked and did not find my issue in the already reported ones

Describe the bug

After moving to 5.6.0, Scope / histogram exposure scroll direction was reversed, meaning that scroll up will make exposure/black point lower; while scroll down will make them higher.

This is obviously a regression unless designed with a purpose. I remember in 5.4.0 the direction was aligned with other tools.

Steps to reproduce

1. Open any image in darkroom
2. Go to the scope / histogram
3. Scroll mouse wheel up while hovering on the exposure partition
4. Notice the value going down

Expected behavior

Scroll up = Increase value; Down = Decrease.

Logfile | Screenshot | Screencast

This should be a trivial reproduction for DT 5.6.0.

Commit

No response

Where did you obtain darktable from?

darktable.org / GitHub release

darktable version

darktable 5.6.0

What OS are you using?

Windows

What is the version of your OS?

Windows 10 Home

Describe your system

No response

Are you using OpenCL GPU in darktable?

Yes

If yes, what is the GPU card and driver?

RTX2080

Please provide additional context if applicable. You can attach files too, but might need to rename to .txt or .zip

No response

Reproduce the regression in darktable 5.6.0 by opening an image in darkroom and scrolling over the scope/histogram exposure partition. Trace the mouse-wheel handling for exposure and black point, then verify that scrolling up increases the value and scrolling down decreases it on Windows.