docs: finish user guide updates (#11603)

* finished settings changes

* fix todos

* update titles

www/apps/user-guide/app/customers/groups/page.mdx

@@ -5,7 +5,7 @@ sidebar_position: 2
 import { EllipsisHorizontal, ArrowUpRightOnBox, EllipsisVertical } from "@medusajs/icons"
 
 export const metadata = {
-  title: `Manage Customer Groups`,
+  title: `Manage Customer Groups in Medusa Admin`,
 }
 
 # {metadata.title}

www/apps/user-guide/app/customers/manage/page.mdx

@@ -6,7 +6,7 @@ import { EllipsisHorizontal, ArrowUpRightOnBox, EllipsisVertical } from "@medusa
 import { Table } from "docs-ui"
 
 export const metadata = {
-  title: `Manage Customers`,
+  title: `Manage Customers in Medusa Admin`,
 }
 
 # {metadata.title}

www/apps/user-guide/app/customers/page.mdx

@@ -3,7 +3,7 @@ sidebar_autogenerate_exclude: true
 ---
 
 export const metadata = {
-  title: `Customers Overview`,
+  title: `Customers Overview in Medusa Admin`,
 }
 
 # {metadata.title}