Remove settings search @groupId filters - since group ids can now be extension guids, and nobody uses this anyway

Fixes #41165

commands: if only one resource is selected explictly call save since the behavior is a bit different than save all

fixes #41841

fixes #41835

Fixes #41795

Make sure we use the correct path seps and normalization on windows for the new webview protocol

Fixes #41823

fixes #41778

* adding suggestion to search for extension when files are of unknown mime type

* delaying file based suggestions to allow mime types to be populated

* adding telemetry and responding to ramya's feedback

* Fix rebase errors, duplicate key error, tests & prompt only once for file type

including counts per result group

fixes #41734

fixes #41559