* use the OTP that the server provides instead of generating one in the JS client
* fix button styling
* differentiate between OTP and encoded token and encrypted token in the template
* add NavHeader component
* use NavHeader in SplashPage component and application.hbs
* let download button take a block
* add RadialProgress component
* use RadialProgress in ShamirFlow component
* style up the RadialProgress component
* update ember-basic-dropdown, ember-basic-dropdown-hover
* rework operation token generation workflow
* directly depend on ember-maybe-in-element