Hit enter to replace next when in the replace field

In find/replace, hitting enter always finds next.  Ctrl+alt+H is awkward and slow.  When the cursor is in the "Replace with" field, enter should replace and find next.

(especially helpful when copy-pasting a line with the number "3" in it, and I want to replace "3" with "4" then "5" then "6" etc, or similar.  In Xcode the keystrokes for that would be 4 - enter - 5 - enter - 6 - enter.  (It auto selects the replace field after you hit enter; if you don't do this, at least 4 - enter - delete - 5 - enter - delete - 6 - enter should work).