Fix issue with `cmd-w` closing window in preview tabs on MacOS (#25878)
Ben Kunkle
created
Closes #25810
Reorders default macOS keymap so that `cmd-w` in `"context":
"PromptLibrary"` bindings is not the last binding for
`workspace::CloseWindow` and therefore does not get rendered in the app
menu or intercepted by MacOS
Release Notes:
- N/A