Feat SectionsManualChecker: tentative implementation + UI for manual edition of section trace
fix SectionsManualChecker: bug in section punch computation + refresh display
refactor tests: use testfactory package instead of GecoFixtures
test SectionsManualChecker
feat PunchPanel: display a popup when resetting a section is forbidden on current trace (on MP)
test SectionsManualChecker
Merge pull request #35 from sdenier/feat-section-trace-edition

Feature: manual edition of section trace in runner punch panel