[IMPROVEMENT] The "Manage ignored updates" dialog should allow sorting and filtering the list of ignored updates

### 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

The list of ignored updates is presented in seemingly random order, and this order cannot be changed on the UI.
This unordered presentation should be replaced with a table (initially sorted by name) that would allow sorting, just like the other tables do in the screens of the application.
Searching and filtering the ignored list would be a nice-to-have addition, too.

### Describe how this improvement could help users

This improvement would help in quickly finding a certain ignored update or a group of related ignored updates (by name fragment, source, etc.) when the ignored list contains more than a handful of entries, without having to go through the whole list and inspecting each entry one by one.