Start experimenting with a history view.
Start integrating calendar.
Correctly display product changes in calendar.
Experiment with click handling.
Highlight hovered items.
Handle clicks on product changes.
Keep calendar in sync with changes.
Make sure highlight is cleared on leave.
Merge branch 'history'
Correctly encode email headers and text.
Add calendar.py to precompile list.
Export description to CSV.
Improve calendar navigation.
Filter calendar by base area.
Comment calendar code.
Add context menu to calendar.
Fix calendar view on windows classic.
Start displaying work topic due dates.
Factor out work topic filtering.
Make work topics visually different.