Repeating shifts of a visual block created by upward movement does not work as expected

[scottopell]

Is this a BUG REPORT or FEATURE REQUEST? (choose one):
BUG REPORT

What happened:
I did a visual selection of a block upwards (eg Vkk>) and it indented the above two lines.
When I repeated this action via ., it went up two lines from the cursor and indented them, which is incorrect.

What did you expect to happen:
I expected the block to re-indent the same lines I previously had selected.

Here is vim 8 doing the same thing:

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

Environment:

• Extension (VsCodeVim) version: 0.11.3 (can replicate on master)
• VSCode version: 1.21.1
• OS version: MacOS 10.12.6

I added some failing tests to demonstrate this on my branch:
https://github.com/scottopell/Vim/tree/block-indent-repetition

I'm open to contributing a fix back to this, do you have any tips on where to get started? I'm not sure if this is a bug with the the way actions are repeated, or visual block, etc

[Chillee]

The fix is actually a bit tricky. It was previously reported here: #549

and this comment talks about why it's a little bit tricky:
#549 (comment)

I'm going to close this issue as a duplicate, but I'd be happy to help with getting started.