3.34.1
  - symbolic: propegate the checkmark refinements
  - symbolic: slightly smaller media-eject
  - symbolic: centre alignment for go-next/previous
  - symbolic: refined preferences-system-parental-controls
  - symbolic: adjust batteries 20 and 30; fix mail attachement
  - symbolic: add ! to battery level 0
  - symbolic: be less clever in the document icons
  - symbolic: refine clear icons; retire brush metaphor for clear-all
  - symbolic: refine alarm shape
  - symbolic: missing classes for battery icons