Cursor position lost when re-focusing editor and hitting escape

Describe the bug
When the editor window loses focus and is then refocused, upon hitting "escape", the scroll position snaps back to the old position it was at before losing focus. That means when you click back into the editor and hit escape your scroll position snaps back, which is confusing.

To Reproduce
Steps to reproduce the behavior:

1. Open file
2. Split file vertically (not necessary but helps test)
3. Open new file on one side
4. Focus new file
5. Focus back to old file using mouse
6. Hit escape

Notice the cursor goes back to the old position rather than staying at the current position.

Expected behavior
Cursor does not change after hitting escape

Screenshots
If applicable, add screenshots to help explain your problem.

Environment (please complete the following information):

• Extension (VsCodeVim) version:
• VSCode version: 0.15.7
• OS: Mac OS 10.13.3

Start by reproducing the six-step sequence in VSCodeVim on the reported VS Code and macOS versions, checking the cursor and scroll position before and after refocusing and pressing Escape. Done means the cursor and scroll position remain unchanged after Escape; no source file or test is identified in the issue.