jk doesn't respect tab size

[falsandtru]

Describe the bug
A clear and concise description of what the bug is.

To Reproduce
Steps to reproduce the behavior:

func f() {
	return
}

1. Put cursor on r.
2. Type k.
3. Cursor moves onto u.

Expected behavior
Cursor moves onto n.

Screenshots
If applicable, add screenshots to help explain your problem.
If remapping-related, please attach log output: https://github.com/VSCodeVim/Vim#debugging-remappings.

Environment (please complete the following information):

• Extension (VsCodeVim) version:1.8.1
• VSCode version:1.34.0
• OS:Ubuntu 18.04

Additional context
This is a problem especially with go lang because go formatter replaces spaces with tabs.

[ctidd]

For the maintainers (if you prefer to dedupe issues) the following are related: #2458, #2913

This has been reproduced on Linux, MacOS, and Windows.

[J-Fields]

Closing in favor of #2458