[IMP] Use radio widget in various views

+ some UI messages improvements

(Closes #1913)
[IMP] website.theme: add button in customize theme modal to show all theme modules
[IMP]event:improvement kanban view with sparkline_bar,guage graph widget & with event detail link like sponsors,tracks,agenda
[FIX/ADD]while click on (agenda & public view) in event_kanban to redirect on website,Web_kanban:add new features (type = 'url')for kanban to redirect on website