macOS: Rename Tab Title popup focuses incorrect control with "Keyboard navigation" system setting

[mitchellh]

Discussed in #7105

^{Originally posted by felipevolpone April 16, 2025}
At least in mac os, when the popup appears the focus of the cursor is not on the text field, but on the "Cancel" button, which is not ideal for user experience point of view.

Not sure if it's possible to see with this screenshot:

More context #4217

edit1: Mac OS 15.3.2 with Ghostty in tip update channel.

Reproduction

1. Enable Settings -> Keyboard -> Keyboard Navigation
2. Open Ghostty
3. "View -> Change Title"