search-in-workspace: replace in files should focus replace field when term is present

[vince-fugnitto]

Bug Description:

Following #10242, the replace in files command should focus the replace input field when a term is present (when the search input is pre-populated). Currently the search input field is always focused:

replace-bug.mp4

Steps to Reproduce:

1. start the application with a workspace present, and open a text document
2. select a word in the document
3. perform replace in files
4. confirm that the replace input is not focused (while in vscode it is properly handled)

Additional Information

• Add Replace in Files command to Edit main-menu #10242 (review).