Better handle read-only files
When trying to save, even if unintentionally, instead of an error message, it would be interesting to have a message that the file cannot be saved.
Gravação_de_tela_de_24-03-2022_01_00_54
In addition to not being able to see the file because of the error message, when trying to close it, a window appears asking if I want to save the file, what again and when I click save, it doesn't show an error message, it just looks like it was saved.