FIx missing progress events

[AlexTugarev]

Fixes #7311

What it does

Fixes missing progress events which led to stale location progress'

How to test

Not sure how to reproduce, but if you switch between Explorer, Search, Debug views frequently and do some work there, i.e. generate some progress, you should always see the progress bar disappear, when the tasks are done.

I've added a test cases for this, and without this change the events for "scm" aren't logged at all.

Review checklist

• as an author, I have thoroughly tested my changes and carefully followed the review guidelines

Reminder for reviewers

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[AlexTugarev]

@akosyakov still having

Uncaught Error: @Inject called with undefined this could mean that the class undefined has a circular dependency problem. You can use a LazyServiceIdentifer to overcome this limitation.

✔️ resolved

[akosyakov]

Code wise looks good but will be good to test as well.

[akosyakov]

I've tested by:

• open the explorer view in the left sidebar
• open the scm view in the right sidebar
• limit the connection to 100% package lost
• trigger refresh in the scm view and open several folders in the explore view
• wait till progress is reported in both views, it should hang since connection is down
• disable connection limiting
• the scm view is successfully refreshed and folders are expanded in the explore view
• not stale progress indicators

@AlexTugarev thank you!