NavTree: Make it possible to configure where in nav tree plugins live (#55484)

* NewIA: Plugin nav config

* progress

* Progress

* Things are working

* Add monitoring node

* Add alerts and incidents

* added experiment with standalone page

* Refactoring by adding a type for navtree root

* First test working

* More tests

* more tests

* Progress on richer config and sorting

* Sort weight working

* Path config

* Improving logic for not including admin or cfg nodes, making it the last step so that enterprise can add admin nodes without having to worry about the section not existing

* fixed index routes

* removed file

* Fixes

* Fixing tests

* Fixing more tests and adding support for weight config

* Updates

* Remove unused fake

* More fixes

* Minor tweak

* Minor fix

* Can now control position using sortweight even when existing items have no sortweight

* Added tests for frontend standalone page logic

* more tests

* Remove unused fake and fixed lint issue

* Moving reading settings to navtree impl package

* remove nav_id setting prefix

* Remove old test file

* Fix trailing newline

* Fixed bug with adding nil node

* fixing lint issue

* remove some code we have to rethink

* move read settings to PrivideService and switch to util.SplitString

pkg/api/index.go

@@ -3,7 +3,6 @@ package api
 import (
 	"fmt"
 	"net/http"
-	"sort"
 	"strings"
 
 	"github.com/grafana/grafana/pkg/api/dtos"
@@ -150,9 +149,9 @@ func (hs *HTTPServer) setIndexViewData(c *models.ReqContext) (*dtos.IndexViewDat
 
 	hs.HooksService.RunIndexDataHooks(&data, c)
 
-	sort.SliceStable(data.NavTree, func(i, j int) bool {
-		return data.NavTree[i].SortWeight < data.NavTree[j].SortWeight
-	})
+	// This will remove empty cfg or admin sections and move sections around if topnav is enabled
+	data.NavTree.RemoveEmptySectionsAndApplyNewInformationArchitecture(hs.Features.IsEnabled(featuremgmt.FlagTopnav))
+	data.NavTree.Sort()
 
 	return &data, nil
 }