frontend for adding new application member

- updated styling
- eliminated stray <form> tag in application team template

js/components/forms/multi_step_modal_form.js

@@ -1,6 +1,7 @@
 import FormMixin from '../../mixins/form'
 import textinput from '../text_input'
 import optionsinput from '../options_input'
+import checkboxinput from '../checkbox_input'
 import Selector from '../selector'
 import Modal from '../../mixins/modal'
 import toggler from '../toggler'
@@ -16,6 +17,7 @@ export default {
     Selector,
     textinput,
     optionsinput,
+    checkboxinput,
   },
 
   props: {