Add `fix` semantic support

[MichaelCurrin]

Perhaps assume feat if no other context can be found.

Then click the button again. If the output message is the same as the input message, then replace feat with fix

Such that clicking the button twice gives "fix".

Perhaps an option can be added in the command prompt to go straight to fix as well. An extra button would not work so well on a small screen where there are a few other extensions already

And adding a pop-up on the single button would not be a nice flow because mostly its not needed