Language ordering

Language sorting in initial (when booting live cd) language selection puts lower cased languages in the end while language selection during installation does not.

Initial language selection:

Language selection during installing:

edit: Language selection after installation seems to be fine as well.

**To Reproduce**
Steps to reproduce the behavior:
1. Run live cd installer and check list of languages in initial language selection.
2. Run "install elementary os" and check list of languages there.

**Expected behavior**
List is ordered alphabetically regardless of case.

**Desktop (please complete the following information):**
- OS: elementary OS 6

**Additional context**
Having language list sorted regardless of case makes way more sense for me, at first I didn't think that polish was supported at all, which was super weird. It's correct grammatically to have language name lower cased in polish.

Riproduci il problema nell’installer del live CD confrontando la selezione iniziale della lingua con l’elenco delle lingue mostrato durante l’installazione. Traccia le due viste di selezione e il loro comportamento di ordinamento; il lavoro è completato quando entrambi gli elenchi sono ordinati alfabeticamente indipendentemente dalle maiuscole e minuscole, inclusi i nomi delle lingue scritti in minuscolo.

Scritto dal modello di indicizzazione a partire dal testo della issue.