Feature request: auto Cover Downloader

[raptor264]

For a quantity of approximately 300 games doing it manually is an investment of time. Please this gui is fantastic. Only this great function is missing.

[WyntrHeart]

I'd like to second this request. Would be a super nice feature to have

[Maudfer]

The UI implementation could pretty much be entirely lifted from duckstation-qt
which allows you to use whatever URL you want for the cover database, and let's you embed the games GUIDs in the URL template.

https://github.com/stenzek/duckstation/blob/master/src/duckstation-qt/coverdownloaddialog.ui
https://github.com/stenzek/duckstation/blob/master/src/duckstation-qt/coverdownloaddialog.cpp
https://github.com/stenzek/duckstation/blob/master/src/duckstation-qt/coverdownloaddialog.h