[CmdPal] Visual dock tweaks (#45954)

## Summary of the Pull Request

- Changes the Dock height to 38px (from 32) to avoid item and app
clipping.
- Localization
- Removing dead code
- If the tooltip string is null or empty, the tooltip will not be shown
- Adding hyperlinks on the General and Dock pages in Settings (to be
updated to the corresponding docs via aka.ms)
- The droptarget for an empty listview is now wider, and has a
highlight-color to communicate an item can be dropped:
<img width="371" height="142" alt="image"
src="https://github.com/user-attachments/assets/6863ca5a-cdd4-450b-ab57-d03d83170cf8"
/>



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## PR Checklist

- [ ] Closes: #xxx
<!-- - [ ] Closes: #yyy (add separate lines for additional resolved
issues) -->
- [ ] **Communication:** I've discussed this with core contributors
already. If the 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](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ESRPSigning_core.json)
for new binaries
- [ ] [WXS for
installer](https://github.com/microsoft/PowerToys/blob/main/installer/PowerToysSetup/Product.wxs)
for new binaries and localization folder
- [ ] [YML for CI
pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ci/templates/build-powertoys-steps.yml)
for new test projects
- [ ] [YML for signed
pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/release.yml)
- [ ] **Documentation updated:** If checked, please file a pull request
on [our docs
repo](https://github.com/MicrosoftDocs/windows-uwp/tree/docs/hub/powertoys)
and link it here: #xxx

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## Detailed Description of the Pull Request / Additional comments

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