Testing Overhaul

• Testing is now a real phase: a module is finished when its testing is complete - all bugs found - not the instant it happens to have no open bugs. A coverage bar shows how far testing has come.
• Bugs are now uncovered while you test a feature, not during development - so testing finally has a purpose.

Improvements

• Hover a feature on the kanban board to highlight the bugs that belong to it, at a glance.
• Smoother main menu - removed occasional hitches when the menu cycles between eras.