Create-PR view: sparkle icon doesn't visually indicate that it has focus



https://github.com/microsoft/vscode-pull-request-github/assets/16353531/c78b45fd-0f33-4d0e-ab1f-f763326015f5



GHPR v0.77.2023111509

```
Version: 1.85.0-insider
Commit: 54821ee1f14beca4866abd7de86175b4794b030d
Date: 2023-11-14T12:58:56.073Z
Electron: 25.9.4
ElectronBuildId: 25127168
Chromium: 114.0.5735.289
Node.js: 18.15.0
V8: 11.4.183.29-electron.0
OS: Darwin arm64 23.1.0
```