flatpak: Don't try to download non-flatpak apps
When handling gs_plugin_download(), build a list of flatpak apps up front so that we don't accidentally try to download any non-flatpak apps later (and fail horribly).
Fixes: #459 (closed)
When handling gs_plugin_download(), build a list of flatpak apps up front so that we don't accidentally try to download any non-flatpak apps later (and fail horribly).
Fixes: #459 (closed)