* 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
* add error template to access so that we can see the sidebar even if you don't have permissions
* identity template cleanup
* make the token expiry warning friendlier and style it
* adding columnify and ember-cli-cjs-transform
* add yargs-parser
* remove vendored yargs-parser tokenizer and use cjs transform to import it from actual yargs-parser
* add clear command that clears the log, but maintains history
* make codemirror have no gutter and be auto-height when rendered in the console output log
* add fullscreen command and hook up fullscreen toggle button
* hook up copy button
