Bug 493204

SUMMARY

I recently upgraded from Xubuntu 20.04 to 24.04 and found Okular to be completely useless because scrolling completely overshoots and seemingly no way to disable it.

I'm using a laptop, but I'm using a mouse not the trackpad (Logitech Wireless Mouse):

```
lsusb

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 046d:c534 Logitech, Inc. Unifying Receiver
Bus 001 Device 003: ID 13d3:56ff IMC Networks Integrated Camera
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 003: ID 0bda:c123 Realtek Semiconductor Corp. Bluetooth Radio
Bus 003 Device 004: ID 04f3:0c4b Elan Microelectronics Corp. ELAN:Fingerprint
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
```


STEPS TO REPRODUCE
1. Go to Settings -> Configure Okular
2. Disable smooth scrolling
3. Restart Okular
4. Use the mouse and drag the the PDF

OBSERVED RESULT

See the video:
https://youtu.be/TH0zeToL1T4

The PDF overshot so much the video encoder couldn't keep up. It scrolled 4 pages. Whereas the version bundled with Ubuntu 20.04 would only send me to the end of the 1st page.

EXPECTED RESULT

Scroll should not have inertia.

SOFTWARE/OS VERSIONS
Windows: N/A
macOS: N/A
(available in the Info Center app, or by running `kinfo` in a terminal window)
Linux/KDE Plasma: 
KDE Plasma Version: None, I use xfce 4.18
KDE Frameworks Version: Unknown
Qt Version: 5.15.13

ADDITIONAL INFORMATION