Replace validateValue by validate in inline edit
better presentation of demo login
updated german translations
Merge pull request #2550 from OskarStark/patch-2

updated german translations
Merge pull request #2549 from OskarStark/patch-1

better presentation of demo login
Merge pull request #2548 from EmmanuelVella/list-editable-validate

Replace validateValue by validate in inline edit
set headlines for "demo" and "documentation"
Merge pull request #2555 from OskarStark/patch-3

set headlines for "demo" and "documentation"
Merge remote-tracking branch 'sonata-project/master'