Edit history should include language

[Discostu36]

At the moment, if the only change to a toot when it is edited is changing the selected language, the Tusky edit history shows two identical versions. Instead, the history should show the language metadata, at least if it was changed.

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• Tusky Version: 23.0

• Android Version: 12

• Android Device: Fairphone 4

• Mastodon instance (if applicable):

• [ x] I searched or browsed the repo’s other issues to ensure this is not a duplicate.