Fix grammar shortcut OR auto-fix

Fix-grammar for non native speakers is the key feature.

I want it to run automatically, without the need to open a menu.

Possible solutions are, from cheapest to more expensive:

• Add a dedicated button + shortcut 🔥

• Run before publishing/schedilng (optionally).

• Auto-run after a small delay (optionally).

I think the first options is the simplest one in terms of implementing, costs, user learning.