Similar to this question: Disable global search in GTK file chooser
Since upgrading from ubuntu 18.04 to 19.10, my file-open experience has become much less fluid: where a single letter-key press used to take me to the first occurrence of that letter as initial character in a filename in the list of files (and subsequent keystrokes would build a leading string to match against), the same keystroke now triggers a cumbersome and more-processor-intensive filesystem-wide search. This is absurd. I navigated to the directory I know a particular file is in, and jumping to its location with a single keystroke, then hitting Enter to open it was so simple.
How do I restore the old behavior?