Remove the wildcard apps afterthe very first refine call

If we have filter flags set then gs_plugin_loader_run_refine_filter() is called
indirectly twice, so all the wildcards get added again as they're only removed
in gs_plugin_loader_run_refine().

Fixes the other half of #736
2 jobs for wip/hughsie/no-claim-wildcard in 18 minutes and 48 seconds
Status Job ID Name Coverage
  Build
passed #356617
build-gnome-software

00:18:48

failed #356540
build-gnome-software

00:24:38