plugin: include registration of view containers

[vince-fugnitto]

What it does

Fixes: #8016

The following pull-request updates the plugin system to include
the registration of view containers in the open view prefix menu.

How to test

1. add the gitlens extension
2. close the gitlens view if it is visible
3. trigger the open view prefix quick-open menu (opened by the view > open view menu)
4. select gitlens, and verify that the view is opened correctly
5. trigger the open view again selecting gitlens (the view should remain open (not toggle))

Review checklist

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

Reminder for reviewers

• as a reviewer, I agree to behave in accordance with the review guidelines

Signed-off-by: vince-fugnitto vincent.fugnitto@ericsson.com

[lmcbout]

Works well
Thanks @vince-fugnitto

[akosyakov]

I find it confusing without grouping. Maybe we can add group attribute to QuickOpenViewItem? and aligned to use values from VS Code?

[vince-fugnitto]

I find it confusing without grouping.

@akosyakov I believe that master is also confusing, as we include items such as Line History which is contributed by Gitlens but there is no info in the open view.

That is why I initially proposed #8026, to try and group based on the actual containers and contributed views, but the step further would be to group based on where they are contributed.

For example, for views contributed to the explorer such as npm scripts, we group them all under explorer.

[akosyakov]

ok, let's do it in another PR, but take care that view containers are only activated, not toggled

[vince-fugnitto]

@lmcbout do you mind re-testing, I've updated the 'how to test' section following the recent changes.

[lmcbout]

Works as expected
No toggling for the view when re-selectiong View -> open-view
The other views DO not TOGGLE either
Tested on Ubuntu with Chrome and FireFox

[vince-fugnitto]

I'll merge tomorrow if there are no objections.