Corpus.get_like method is weirdly sorted

[PonteIneptique]

Describe the bug

When auto-completing lemma or morph, there can be weird sorting. It seems to be mostly due to few things: there is only one result and it's what being typed (I still think this should be shown), or some results contains uppercase letter.

To Reproduce
Steps to reproduce the behavior:

1. Go to a Corpus
2. Click on Correct Token
3. Correct a token with auto-completion
4. See the sorting of values

Expected behavior
Sorting should not be case dependant and we should make sure that even in the case of a single results, it should be shown.

[PonteIneptique]

I think the solution might be different between morph, POS and lemma. But I'd probably try first with a sort on value_readable