Make sorting lists by name/title case-insensitive (#2993)

* Make sort by order_* fields case-insensitive.

* Sort internet radios by name case-insensitive

scanner/mapping_internal_test.go

@@ -3,7 +3,6 @@ package scanner
 import (
 	"context"
 
-	"github.com/navidrome/navidrome/conf"
 	"github.com/navidrome/navidrome/model"
 	"github.com/navidrome/navidrome/scanner/metadata"
 	"github.com/navidrome/navidrome/tests"
@@ -161,19 +160,4 @@ var _ = Describe("mapping", func() {
 			})
 		})
 	})
-
-	Describe("sanitizeFieldForSorting", func() {
-		BeforeEach(func() {
-			conf.Server.IgnoredArticles = "The O"
-		})
-		It("sanitize accents", func() {
-			Expect(sanitizeFieldForSorting("Céu")).To(Equal("Ceu"))
-		})
-		It("removes articles", func() {
-			Expect(sanitizeFieldForSorting("The Beatles")).To(Equal("Beatles"))
-		})
-		It("removes accented articles", func() {
-			Expect(sanitizeFieldForSorting("Õ Blésq Blom")).To(Equal("Blesq Blom"))
-		})
-	})
 })