make use of deleteThumbnails function in the blog module
Keep get parameters when rewriting backend url
Merge pull request #476 from DoFken/patch-11

Keep get parameters when rewriting backend url
Merge pull request #474 from guytarded/deleteThumbnails

make use of deleteThumbnails function in the blog module
Merge branch 'master' into migration-symfony-bundles

* master:
  Keep get parameters when rewriting backend url
  make use of deleteThumbnails function in the blog module