[IMPROVEMENT] Use default icon from "master" prefix

### Please confirm these before moving forward.

- [x] I have searched for my feature proposal and have not found a work-in-progress/duplicate/resolved/discarded issue.
- [x] This improvement refers to an existing feature. If you want to suggest a new feature, please use [this template](https://github.com/marticliment/WingetUI/issues/new?assignees=marticliment&labels=new-feature&projects=&template=feature-request.yml&title=%5BFEATURE+REQUEST%5D+%28Enter+your+description+here%29).
- [x] This improvement is not a bug. If you want to report a bug, please use [this template](https://github.com/marticliment/WingetUI/issues/new?assignees=marticliment&labels=bug&projects=&template=bug-issue.yml&title=%5BBUG%5D+%28Enter+your+description+here%29).

### Describe the improvement

Use icon from "master" prefix. If icon is missing, try check prefix have icon.
Example:
- `Mozilla.Firefox.ESR.de` -> no icon -> try `Mozilla.Firefox.ESR`
- `Mozilla.Thunderbird.de` -> no icon -> `Mozilla.Thunderbird`

### Describe how this improvement could help users

One icon fro multiple "sub" applications like localized apps.