Annoying Fonts Window in Emacs on MacOS - How to Hide

[Mark H. David]

I frequently type Command+T by mistake in Emacs because in browser apps 
(particularly Chrome) it's used for creating a new tab, and I do that so often, 
I must do it by mistake. I almost never change fonts, and never with command+t. 
Ever.
So, I looked into this a bit, and it's a documented "feature" for Emacs on 
MacOS (see: https://www.emacswiki.org/emacs/SetFonts#toc14) and for MacOS 
generally for documents (see: https://support.apple.com/en-us/HT201236). 
Apple's MacOS doc says: Command-T: Show or hide the Fonts window.

In various apps with document windows (e.g., build-in TextEdit as well as 
Emacs) it is supposed to pop up a window thingee that lets you choose fonts. 
Whatever, I never use. I always just want to get rid of it.

Here's the annoying and buggy part with respect to Emacs: you cannot hide it 
from the keyboard.  It's supposed hidden by doing a second Command+T. That 
works in other apps, e.g., TextEdit, but it doesn't work in Emacs. In addition, 
you cannot select the popup "windoid" that results, even by Command+`. Even if 
you do select the windoid somehow (e.g., by clicking it), you cannot dismiss it 
by typing Command+W.

So, this is super annoying and a bug.  

Here's my Emacs version.

"GNU Emacs 25.3.1 (x86_64-apple-darwin13.4.0, NS appkit-1265.21 Version 10.9.5 
(Build 13F1911)) of 2017-09-12"

I'd appreciate knowing if this is a known bug, if it's fixed upstream, and if 
anyone can share any workaround.

Thanks,

-Mark