This worked like a charm. I tried all sorts of settings- In the end did a reset of Language settings, but nothing worked. This should be higher up in the Google Search rankings.
I tapped on the "settings" wheel but found no direct way to get the microphone back. What I had to do was "reset settings" under "other settings." Then I had the microphone again, with a "settings" wheel in the corner of that key, which allowed me to get back in and make the choice what I wanted to show on that key.
The microphone is still through there, but hidden. You need to tap and hold the icon to the right of the Sym tab. A window will open with more options, including the microphone.