Provide a way for users to re-enable past translations in a text

[tfnribeiro]

While discussing the possibility of hiding translations, this idea also came out of the discussion, where some users might want to go back to a text and still have some indication of the words translated in the past.

There are a few possibilities:

• We could have this as a Setting, which the user could turn on and off in the settings.
• We could prompt the user if we detect a previous reading session with bookmarks, similar to the screenshot below.
• Enable / Disable through a flag similar to the "Did you like this article?" at the end of reading the text.

Just some ideas, not sure if it would be very beneficial.