Hello Alex,
I have good news for you: you are not blind! It’s a new feature in Publii 0.36 :-)!
You can read more about the new spellchecker here:
Publii 0.36 Prerelease 1 ready for testing; come help us make it better!
So you can call of the doctor, relax and upgrade to Publii 0.36 (or wait for the final release).
Verhoeckx