Rename recipientId to contributorId in proposals

app/components/add-proposal/component.js

@@ -8,7 +8,7 @@ export default Component.extend({
 
   // Default attributes used by reset
   attributes: {
-    recipientId: null,
+    contributorId: null,
     kind: 'community',
     amount: null,
     description: null,
@@ -22,7 +22,7 @@ export default Component.extend({
 
   contributors: [],
 
-  isValidRecipient: isPresent('recipientId'),
+  isValidRecipient: isPresent('contributorId'),
   isValidAmount: computed('amount', function() {
     return parseInt(this.get('amount'), 10) > 0;
   }),

app/components/add-proposal/template.hbs

@@ -1,9 +1,9 @@
 <form {{action "submit" on="submit"}}>
   <p>
-    <select required onchange={{action (mut recipientId) value="target.value"}}>
+    <select required onchange={{action (mut contributorId) value="target.value"}}>
       <option value="" selected disabled hidden>Contributor</option>
       {{#each contributors as |contributor|}}
-        <option value={{contributor.id}} selected={{eq recipientId contributor.id}}>{{contributor.github_username}}</option>
+        <option value={{contributor.id}} selected={{eq contributorId contributor.id}}>{{contributor.github_username}}</option>
       {{/each}}
     </select>
   </p>