Remove the arrow repeat delay for image panning.

[CreativeWorld]

Windows has key repeat delay and repeat rate settings in Control Panel -> Keyboard. But this is for text input, not for scrolling or panning with arrow keys. Windows 10's default Photos app does not have this delay when panning a zoomed-in image. But XnView MP seems to have this delay. That is, if you press down the down arrow key and not release it, there is a stutter after the very first panning down. This is not good.

Windows 10's Photos app seems to be a UWP which uses a complete different framework than the traditional Win32 applications, so the input system may also be different for it, but even a traditional Win32 image viewer like Honeyview does not have this delay when panning, so it probably is possible for XnView MP to remove this delay.

[CreativeWorld]

I have searched StackOverflow about this. One suggested method seems to be not actually panning the image by each key down event. That is, at the first key down event, you start panning the image and keep panning it on your own suitable speed until you get the key up event.

[xnview]

currently i don't find a way to disable it