help: Update composer docs
Some recent changes to the composer layout need to be reflected in the user manual.
Also added an explanation of what the Cc, Bcc, and Reply-To fields do.
Fixed some typos and improved wording elsewhere on the page.
Some recent changes to the composer layout need to be reflected in the user manual.
Also added an explanation of what the Cc, Bcc, and Reply-To fields do.
Fixed some typos and improved wording elsewhere on the page.