Require defense component input before showing Save button

templates/components/options_input.html

@@ -1,7 +1,7 @@
 {% from "components/icon.html" import Icon %}
 {% from "components/tooltip.html" import Tooltip %}
 
-{% macro OptionsInput(field, tooltip, inline=False, label=True, disabled=False, watch=False) -%}
+{% macro OptionsInput(field, tooltip, inline=False, label=True, disabled=False, watch=False, optional=True) -%}
   <optionsinput
     name='{{ field.name }}'
     inline-template
@@ -9,6 +9,7 @@
     {% if field.data and field.data != "None" %}v-bind:initial-value="'{{ field.data }}'"{% endif %}
     key='{{ field.name }}'
     v-bind:watch='{{ watch | string | lower }}'
+    v-bind:optional={{ optional|lower }}
     >
     <div
       v-bind:class="['usa-input', { 'usa-input--error': showError, 'usa-input--success': showValid }]">