In insert mode, hitting `<Down>` after `<C-Left>` does not take current position into account

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Environment:

• VSCode Version: 1.11.2
• VsCodeVim Version: 0.7.0
• OS: Arch Linux

1. Open a python file
2. Write the following in it:

tuples = (
	(1, 12345),
	(1, 67890),
)

Move the cursor to be right after 5 in the first 12345. If you now press Ctrl + ← followed by ↓, the cursor will end up right after 0 instead of right before 6, where you would expect it to be (and where it would be by hitting arrow left 5 times instead of previous word).

This works both in and out of insert mode. I'm not sure if this is a vim or native vscode issue admittedly.

Reproduce the behavior in a Python file using the example and the Ctrl-Left followed by Down sequence, both in and out of insert mode. First determine whether the cursor handling belongs to VSCodeVim or native VS Code; done means Down accounts for the current position and places the cursor before 6, matching repeated left-arrow behavior.