OS: All
VS Code:

Repro Steps:
- Install Docker extension.
- In Docker view, right click one Docker image and execute "Run/Run Interactive/Pull/Push..." commands.
Expect:
Succeed to execute these commands "Run/Run Interactive/Pull/Push..." without any error.
Actual:
An error "Cannot read property 'uri' of undefined" occurs.

More Info:
- This issue does not reproduce in VS Code Insider.
- A similar issue 2177 has been fixed in VS Code Insider.
- This issue does not reproduce with one workspace opening.