[BUG] “Collection Sync Complete” Popup Stays On Top of Other Applications

> Description:
> When performing a sync in recent versions of Anki, a popup message appears stating “Collection Sync complete.” However, if I switch to another application while this message is displayed, the popup remains visible and floats above other application windows, rather than staying within the Anki window or dismissing itself. This behavior is distracting and not consistent with standard UI practices.

Originally reported on https://forums.ankiweb.net/t/bug-collection-sync-complete-popup-stays-on-top-of-other-applications/63680

We may end up addressing this as we get more of the UI in Svelte, as we could overlay a pop-up over the page instead of in a separate window.