Dim Unfocused Minibuffer Prompts

Update : Emacs 31 will ship with a similar feature to the one described below called minibuffer-nonselected-mode . I can easily tell if an Emacs buffer is focused by looking at the buffer’s mode-line. On the other hand, the only indicator that the minibuffer is focused or not is the cursor, and that’s pretty easy to miss. I wanted to avoid making any intrusive changes to the minibuffer, so I…