UX: Don't match emails in user selector in group add members modal.

https://meta.discourse.org/t/cant-add-members-to-a-group/85738?u=tgxworld

app/assets/javascripts/discourse/components/user-selector.js.es6

@@ -33,7 +33,8 @@ export default TextField.extend({
         excludeCurrentUser = bool('excludeCurrentUser'),
         single = bool('single'),
         allowAny = bool('allowAny'),
-        disabled = bool('disabled');
+        disabled = bool('disabled'),
+        disallowEmails = bool('disallowEmails');
 
     function excludedUsernames() {
       // hack works around some issues with allowAny eventing
@@ -64,7 +65,8 @@ export default TextField.extend({
           allowedUsers,
           includeMentionableGroups,
           includeMessageableGroups,
-          group: self.get("group")
+          group: self.get("group"),
+          disallowEmails,
         });
 
         return results;

app/assets/javascripts/discourse/lib/user-search.js.es6

@@ -61,7 +61,7 @@ function organizeResults(r, options) {
     });
   }
 
-  if (options.term.match(/@/)) {
+  if (!options.disallowEmails && options.term.match(/@/)) {
     let e = { username: options.term };
     emails = [ e ];
     results.push(e);

app/assets/javascripts/discourse/templates/modal/group-add-members.hbs

@@ -9,7 +9,8 @@
           class="input-xxlarge"
           usernames=model.usernames
           placeholderKey="groups.selector_placeholder"
-          id="group-add-members-user-selector"}}
+          id="group-add-members-user-selector"
+          disallowEmails=true}}
     </div>
 
     {{#if currentUser.admin}}