Scrolling with mousewheel appears to not respect window bounds in ChildWindow

[evevision]

I've commonly run into an issue where the mousewheel seemingly only works in part of the ChildWindow - seemingly always being some portion starting from the top left. It's unrelated to the contents of the page.

I'm not sure if this occurs after a game resize or window resize, will need to do further testing.

[evevision]

Seems it's based on the POSITION of the game client. The more I move the game window to the right, the less width is scrollable.