Created attachment 148423 [details]
Resize desktop using handler in RTL mode.

SUMMARY
***
The desktop widget resize (using the handler) go to the opposite direction in RTL mode. The affecting the horizontal movement. This happened when using the side handler and corner ones. 
I record a short video about this bug, see the attachement. 


STEPS TO REPRODUCE
1. Run plasma desktop in RTL environment 
2. put widget in the desktop
3. using the handler, try to resize the widget horizontally to the right by dragging the handler to the right.

OBSERVED RESULT
the widget resize horizontally to the left

EXPECTED RESULT
the widget resize horizontally to the right

SOFTWARE/OS VERSIONS
Operating System: KDE neon Unstable Edition
KDE Plasma Version: 5.24.80
KDE Frameworks Version: 5.92.0
Qt Version: 5.15.3
Kernel Version: 5.11.0-40-generic (64-bit)
Graphics Platform: X11
Processors: 3 × AMD Ryzen 9 3900X 12-Core Processor
Memory: 4.9 غ.بايت of RAM
Graphics Processor: llvmpipe

ADDITIONAL INFORMATION