splitview page width is wrong

[adamdill]

Looks like when a new browser tab is initialized, its width is being set to the window width, even when they are in a split pane. I think it should initialize the web view with the split width, not the window width.

Image showing issue, notice scroll bar in bottom right:

[Peshyy]

I don't understand? That's how GitHub works in a normal browser as well.