Poor keyboard interaction in last stage of Replace dialog

[peterflynn]

1. Invoke Replace, type some search text, press Enter
2. Type some replacement text, press Enter
3. Try to skip or cancel the Replace operation via keyboard

Result: Escape, Y, N, A, S all do nothing.
You can press Enter and Tab/Shift-Tab to "click" the focused button, but that's it.

Expected: Escape closes the Find/Replace bar in all other cases, so it should close here too. Keyboard shortcuts for the other buttons would be nice too though.

[redmunds]

There's a backlog item for this: https://trello.com/c/7HVPLeer/975-replace-dialog-keyboard-support

[mrplants]

I'm a brand new contributor and would like to take this on as a first foray into open-source.

[mrplants]

I fixed the bug and submitted a Pull Request as it states in the above post.

[peterflynn]

Closing since this has been superseded by #6175