[konsole] [Bug 425456] New: Trackpoint Scrolling in Konsole broken since 20.07

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https://bugs.kde.org/show_bug.cgi?id=425456

            Bug ID: 425456
           Summary: Trackpoint Scrolling in Konsole broken since 20.07
           Product: konsole
           Version: 20.08.0
          Platform: Archlinux Packages
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: history
          Assignee: konsole-devel at kde.org
          Reporter: l.gaeher at gmail.com
  Target Milestone: ---

Scrolling with trackpoints does not work (or is very stuttery -- scrolling
doesn't do anything) since Konsole version 20.07. Other applications are not
affected. Downgrading just Konsole to 20.04.3 makes everything work again. 


STEPS TO REPRODUCE
1. Open Konsole.
2. Use something that produces a long output, eg. dmesg. 
3. Use trackpoint for scrolling. 

OBSERVED RESULT
Scrolling is very stuttery/only works sometimes (on an IBM SK-8845RC USB
keyboard) or doesn't work at all (on a Lenovo W530 laptop keyboard). 
Touchpad scrolling might also have interruptions, but less severe.
Scrolling with a computer mouse does not seem to be affected. 

EXPECTED RESULT
The output is scrolled up/down when using a trackpoint as input.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: current Arch Linux on kernel 5.8.1-arch1-1
Qt: 5.15.0
KDE Frameworks: 5.73.0
plasmashell 5.19.4

ADDITIONAL INFORMATION

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