DEV: Replace {{user-selector}} with {{email-group-user-chooser}}

assets/javascripts/discourse/components/wizard-mapper-selector.js.es6

@@ -377,7 +377,7 @@ export default Component.extend({
       this.changeValue(event.target.value);
     },
 
-    changeUserValue(previousValue, value) {
+    changeUserValue(value) {
       this.changeValue(value);
     },
   },

assets/javascripts/discourse/templates/components/wizard-mapper-selector.hbs

@@ -66,11 +66,13 @@
   {{/if}}
 
   {{#if showUser}}
-    {{user-selector
-      includeMessageableGroups="true"
+    {{email-group-user-chooser
       placeholderKey=placeholderKey
-      usernames=value
+      value=value
       autocomplete="discourse"
-      onChangeCallback=(action "changeUserValue")}}
+      onChange=(action "changeUserValue")
+      options=(hash
+        includeMessageableGroups="true"
+      )}}
   {{/if}}
 </div>