OSOE-1036: Use ISession.FlushAsync() instead of SaveChangesAsync() in Lombiq.HelpfulLibraries#1224

Piedone merged 2 commits intodevLombiq/Open-Source-Orchard-Core-Extensions:devfrom

issue/OSOE-1036Lombiq/Open-Source-Orchard-Core-Extensions:issue/OSOE-1036Copy head branch name to clipboard