Made PT Launcher per-monitor DPI aware

[drawbyperpetual]

Summary of the Pull Request

Makes PowerToys Launcher per-monitor DPI aware.

PR Checklist

• [X] Closes: #8949
• [X] Communication: I've discussed this with core contributors already. If work hasn't been agreed, this work might be rejected
• [ ] Tests: Added/updated and all pass
• [ ] Localization: All end user facing strings can be localized
• [ ] Dev docs: Added/updated
• [ ] New binaries: Added on the required places
  • [ ] JSON for signing for new binaries
  • [ ] WXS for installer for new binaries and localization folder
  • [ ] YML for CI pipeline for new test projects
  • [ ] YML for signed pipeline
• [ ] Documentation updated: If checked, please file a pull request on our docs repo and link it here: #xxx

Detailed Description of the Pull Request / Additional comments

Makes PowerToys Launcher per-monitor DPI aware by setting this in application manifest.

Validation Steps Performed

When DPI-scaling is different (e.g. 100% vs 175%) between primary and secondary monitor, verified that:

• Before fix, Launcher is sharp on primary and fuzzy on secondary.
• After fix, Launcher is sharp on primary and secondary.

[crutkas]

I feel like we should make this into a wpf props

[jaimecbernardo]

I feel like we should make this into a wpf props

This is in the app.manifest , not a props file, so I'm not sure that would apply here 🤔