[F-r] Allow edit of existing data in Edit Info

[Palloxin]

Describe your suggested feature

Allow to edit existing info in "Edit Info". Sometimes i just want to tweak the existing data a little bit. When the name is too long, am I supposed to re-write it all over again? Japanese names can be very long. Especially the Description.

https://github.com/LNReader/lnreader/assets/75091899/cd0643a2-0fe4-4a2b-ab7c-5a1d81c93d77

Other details

No response

Acknowledgements

• [X] I have searched the existing issues and this is a new ticket, NOT a duplicate or related to another open or closed issue.
• [X] I have written a short but informative title.
• [X] If this is an issue with a source, I should be opening an issue in the sources repository.
• [X] I have updated the app to version 2.0.0.
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