vim_navigateRight doesn't recognise panel on the right side

BUG REPORT

What happened:
I use keybindings to navigate between tabs, panels and the sidebar. I used the keybindings.json setup from #2376, so that I can use ctrl+h/k/j/l to navigate.

I moved the integrated terminal to the right.
ctrl+l (extension.vim_navigateRight) cannot navigate to the integrated terminal on the right hand side.
Unexpectedly, ctrl+j (extension.vim_navigateDown) can focus it.

It seems that it doesn't recognise that I moved the integrated terminal to right.

What did you expect to happen:
extension.vim_navigateRight can navigate to the integrated terminal on the right hand side.
extension.vim_navigateDown should not navigate to the integrated terminal on the right hand side.

How to reproduce it (as minimally and precisely as possible):

1. Open integrated terminal, and move it to right
2. Focus on the editor and press ctrl+l, it won't navigate.
3. However, press ctrl+j can navigate to the terminal.

Environment:

• Extension (VsCodeVim) version: 0.11.3
• VSCode version: 1.21.1
• OS version: macOS 10.13.3

Start by locating the extension.vim_navigateRight and extension.vim_navigateDown command handlers, then reproduce the setup with the integrated terminal moved to the right. Check how each command determines panel position; done means right-side terminals are reached with navigateRight and not navigateDown, while the existing editor and sidebar navigation remains intact.