Merge pull request #27 from bizzl-greekdog/master

Further fixes for Oxid 5.2
Merge pull request #28 from bizzl-greekdog/master

Further fixes.
Sidebar-Block um Snippet erweitern
Merge pull request #29 from dajoho/master

Sidebar-Block um Snippet erweitern
Merge pull request #1 from jkrug/master

Update from upstream