global refactoring for events. this is a very dirty code now
add select type for hall timeslots and improve tests
remove unused files
add site translations
add ransack and pagination to lectures
change schedule
fix migration
fix slot migration
add migration to voting and fix translations
improve code quality
fix admin/lectures/index view
Typo fixed.
modify pagination in admin/lectures controller
add color to workshop
Timetable start hour changed.
fix tests
Add custom schedule event color from admin panel.
Admin panel assets precompile bug fixed.
fix assets
fix admin/users/form view