Add a setting to disable "Show merged or closed MR for branch"

Problem to solve

As a developer, I want to see the latest pipeline and a quick button to create a MR if I don't have any merge requests active.

On the latest extension version, if the current branch has at least a single merge request, it overtakes the MR and pipeline indicators in VS Code, despite the old closed MR being completely irrelevant to me.

Proposal

I suggest a setting to disable the new "Show merged or closed MR for branch" behavior that landed in !3059 (merged) (on a feature request in #2207 (closed))

Further details

I mostly use the extension to control CI pipelines. The branch rarely receives any merge requests, and in my case the previous behavior with "Create MR" and the latest pipeline would be more relevant.

Links / references

• The MR where this behavior was changed: !3059 (merged)
• Feature request that changed the behavior: #2207 (closed)