Sort locales according to their names (#18211)

* Sort locales according to their names

* Fix documentation and sort case insensitive

modules/translation/translation.go

 package translation
 
 import (
+	"sort"
+	"strings"
+
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/options"
 	"code.gitea.io/gitea/modules/setting"
 	supportedTags []language.Tag
 )
 
-// AllLangs returns all supported langauages
+// AllLangs returns all supported languages sorted by name
 func AllLangs() []LangType {
 	return allLangs
 }
 	for i, v := range langs {
 		allLangs = append(allLangs, LangType{v, names[i]})
 	}
+
+	// Sort languages case insensitive according to their name - needed for the user settings
+	sort.Slice(allLangs, func(i, j int) bool {
+		return strings.ToLower(allLangs[i].Name) < strings.ToLower(allLangs[j].Name)
+	})
 }
 
 // Match matches accept languages