[BUGFIX] Missing child content elements in localized parents.

When config.sys_language_overlay = 1, content elements with [Default] (not translated) and [All] languages are also rendered in the "localized parent". When config.sys_language_overlay = hideNonTranslated, content elements with [All] languages are also rendered in the "localized parent".
Merge pull request #642 from pixelmatseriks/workbench/getViewHelperOutput

[BUGFIX] Missing child content elements in localized parents.