[#73270954] editable text

- [x] simple  text field
- [x] empty  text field, required
- [x] select, local array, custom display
- [x] select, remote array, no buttons
- [x] select, error while loading
- [ ] Datepicker
- [x] Combodate (date)
- [x] Combodate (datetime)
- [x] ComboTextarea, buttons below
- [x] Twitter typehead.js-
- [x] Checklist
- [ ] Select2 (tags mode)-
- [x] Select2 (tags dropdown mode)
- [x] Custom input, several fields
You can use bootstraps mixin `border-top-radius` and `border-bottom-radius`
```css
.select2-dropdown-open .select2-choices {
  @include border-top-radius($editable-border-radius);
  @include border-bottom-radius(0);
}
```