Update translations

Fix #886766: Make unreadable custom CSS file a warning and not an error when submitting the settings form

Remove some PHP warnings in non-content pages

Fix #881074 by ceme: use SCRIPT_FILENAME instead of DOCUMENT_ROOT when replacing image paths for local access

Fix #763810: Configure module weights to ensure that the core module is always called before the others

Fix #715800: type-specific settings act as default settings only, not as a type-wide configuration switch