* mark string as html safe before passing to translation instead of bypassing HTML escape using {{{unsafe}}} syntax
* replace ember-i18n with ember-intl
* upgrade Ember CLI to 3.13 and Ember Source + Ember Data to 3.12
Ember Source upgrade to 3.13 is blocked by Ember CP Validations,
which does not support Ember Source 3.13 yet.
Ember Data upgrade to 3.13 is blocked by Ember Data Model Fragments,
which does not support Ember Data 3.13 yet.
Also removes autofocus mixin and inlines the code as mixins are
considered an antipattern in latest Ember versions.
Removes some left overs in `"resolutions"` key. But that shouldn't have a real impact.
* Adds a loading spinner to form buttons as long as submission is pending.
* Does some refactoring of form navigation buttons.
* Updates expected bundle size.
- Drops floatthead and additional scrollbar
- Makes header and first column sticky
- Refactors code for readability
Sticky header is only working in Firefox. Chrome and Edge does not support `position: sticky` for `<thead>`. Haven't tested Safari.
* upgraded ember-moment and use it application-wide service to set locale
* label on poll/participation now observes locale changes, but it's still hacky
* replace computed property on views poll by moment-format helper of ember-moment
started replacing ember-easy-form-extensions by ember-form-master-2000
and ember-validations by ember-cp-validations
using ember-form-master-2000 in old 0.2 release cause newer releases does not work with ember 0.12
should move to ember 2.x as soon as possible
therefore ember-easy-form-extensions has to be dropped and ember-i18n been updated
part of #76
