Moved file does not show diff

[groboclown]

Describe the bug
When a file is moved, the diff attempts to compare the file against the depot version that's in the current path of the file, which generally will be the wrong file.

To Reproduce
Steps to reproduce the behavior:

1. Rename a file that's in the depot, say "a.txt" to "b.txt"
2. Run "Compare with the Same Repository Version" action.

The command fails to find the depot version of "b.txt".

Expected behavior
The command should discover the file is in a move state, and compare the local workspace version of the file against the original location of the file.

Desktop (please complete the following information):

• OS: Every one
• IDE and version: Every one
• Version 0.10.1