Adds working tree status to custom view (insiders)

Hides working changed files behind insiders flag
Unhides Changed Files node from behind insiders flag
Adds changed file count to Changed Files node label
Adds icon to Changed Files node
Adds upstream branch to upstream status nodes
Sorts files in the Changed Files node

package.json

@@ -443,6 +443,11 @@
                     "default": "${filePath}",
                     "description": "Specifies the format of a stashed file in the `GitLens` custom view\nAvailable tokens\n ${file} - file name\n ${filePath} - file name and path\n ${path} - file path"
                 },
+                "gitlens.gitExplorer.statusFileFormat": {
+                    "type": "string",
+                    "default": "${working}${filePath}",
+                    "description": "Specifies the format of the status of a working or committed file in the `GitLens` custom view\nAvailable tokens\n ${file} - file name\n ${filePath} - file name and path\n ${path} - file path\n ${working} - optional indicator if the file is uncommitted"
+                },
                 "gitlens.gitExplorer.view": {
                     "type": "string",
                     "default": "repository",