* upstream/develop:
Rename expandCW to collapseMessageWithSubject.
fix indent
Add support for configurable CW clickthrough.
Merge upstream
fix lint issues
allow default visibility scope to be configured
Add validation of the imported theme and the corresponding warning message
Unify button styles and use min-width
Add German localization for theme import/export
Add theme import feature
Refactor theme settings state initialization
Add theme export feature