Keyboard Shortcut to focus on these windows I've been working without a mouse for several days and almost everything has been fairly easy to manage with keyboard shortcuts.  There are two exceptions:




I'm unable to find a keyboard shortcut that moves the focus to either of these windows.
(EDIT I am on macOS Mojava)
I've tried:

Cmd-Tab
Control-Tab from Finder
Shortcat
^F6 (floating window)

How can I focus (close/dismiss) these windows using only the keyboard?
I don't know any shortcut, but there is a workaround how you can use keyboard only to focus it. You may enable mouse keys - press 5 times Alt key and then use keyboard to move the cursor.
Alternatively you may install some third party tool to control the mouse. My recommendation goes to Karabiner Elements, because I use it for bunch of other useful staff. Once you install it you should  add Mouse Keys Mode.
There is also https://github.com/h2ero/XEasyMotion   but I haven't used it personally.