transient-format: Only highlight infix if minibuffer is used

Without this, toggling an *option* off (i.e., without using the
minibuffer) causes the use of `transient-active-infix' to stick
around.

lisp/transient.el

@@ -3661,7 +3661,8 @@ When `transient-enable-popup-navigation' is non-nil then format
 as a button."
   (let ((str (cl-call-next-method obj)))
     (when (and (cl-typep obj 'transient-infix)
-               (eq (oref obj command) this-original-command))
+               (eq (oref obj command) this-original-command)
+               current-minibuffer-command)
       (setq str (transient--add-face str 'transient-active-infix)))
     (when transient--editp
       (setq str (concat (let ((level (oref obj level)))