Fixed switch to user feature and added browser tests.

app/assets/javascripts/app/controllers/users.js.coffee

@@ -54,8 +54,8 @@ class Index extends App.Controller
       header
 
     callbackAttributes = (value, object, attribute, header, refObject) ->
-      value = ' '
-      attribute.class  = 'glyphicon glyphicon-user'
+      value = ' <svg class="icon-user"><use xlink:href="#icon-user"></use></svg>'
+      attribute.class  = ''
       attribute.link   = '#'
       attribute.title  = App.i18n.translateInline('Switch to')
       value

app/assets/stylesheets/zammad.css.scss

@@ -4006,7 +4006,7 @@ footer {
   color: #fff;
   height: 45px;
   padding: 0 17px;
-  top: -45px !important;
+  /*top: -45px !important;*/
   border-bottom: 5px solid hsl(205,90%,60%);
 }
 .switchBackToUser-icon {

test/browser/switch_to_user_test.rb

@@ -0,0 +1,41 @@
+# encoding: utf-8
+require 'browser_test_helper'
+
+class SwitchToUserTest < TestCase
+  def test_agent_user
+    @browser = browser_instance
+    login(
+      username: 'master@example.com',
+      password: 'test',
+      url:      browser_url,
+    )
+    tasks_close_all()
+
+    click( css: 'a[href="#manage"]' )
+    click( css: 'a[href="#manage/users"]' )
+
+    set(
+      css:   '#content .js-search',
+      value: 'nicole',
+    )
+    sleep 3
+
+    click(
+      css: '#content .icon-user',
+    )
+
+    watch_for(
+      :css     => '#app',
+      :value   => 'zammad looks like',
+    )
+    login = @browser.find_elements( { css: '.user-menu .user a' } )[0].attribute('title')
+    assert_equal(login, 'nicole.braun@zammad.org')
+
+    click( css: '#app .js-close' )
+
+    login = @browser.find_elements( { css: '.user-menu .user a' } )[0].attribute('title')
+    assert_equal(login, 'master@example.com')
+
+  end
+
+end