Open File with :e deletes file content

[micdahl]

Describe the bug
When I open an existing file with :e filename, the content of the existing file is removed.

To Reproduce
Steps to reproduce the behavior:

1. Open Folder with at least 2 existing files.
2. Open one file through clicking on it.
3. Open an other file with :e filename.
4. Get editor window without content and existing file is overwritten without content.

Expected behavior
Existing file is opened without removing its content.

Environment:

• Extension (VsCodeVim) version: 0.16.0
• VSCode version: 1.26
• OS: macOS High Sierra (10.13.6)

Additional context
I think this is a very serious issue, as it causes data loss.

May originate from this commit? The bug must be relative new, as I haven't observed this behavior in the past.

[jpoon]

Closed with #2969