Support find and filter in breadcrumbs picker

[sandy081]

Testing #54935

• Open extensionManagement.ts file
• Open its symbols outline tree from breadcrumbs
• Type version

Expected to see only the sub tree that has matches. But it shows sibling that does not have matches. For example siblings of IExtensionManifest symbol.

Outline view filters them correctly

[jrieken]

It's 'Find' not 'Filter' - in the outline view the default is also 'Find' but you might have this set to 'Filter'

[sandy081]

Right, Its Filter in Outline

[ris58h]

From my point of view it would be useful to have a toggle button (find/filter) right in the picker's input field. Of course there should be a shortcut for it.

Example:

There are such (toggle) buttons in the Search View: Match Case, Match Whole Word, Use Regular Expression.

[jrieken]

This is implemented but impacted by #57089

[jrieken]

The implementation and tree behaviours aren't good. Removed the option for now and moving this to September.