Fixed #366: Changed how GreenLight handles LDAP jpegPhoto (GRN-92) (#445)

* Fixed issue with LDAP jpegPhoto

* Update _header.html.erb

app/assets/javascripts/header.js

@@ -0,0 +1,28 @@
+// BigBlueButton open source conferencing system - http://www.bigbluebutton.org/.
+//
+// Copyright (c) 2018 BigBlueButton Inc. and by respective authors (see below).
+//
+// This program is free software; you can redistribute it and/or modify it under the
+// terms of the GNU Lesser General Public License as published by the Free Software
+// Foundation; either version 3.0 of the License, or (at your option) any later
+// version.
+//
+// BigBlueButton is distributed in the hope that it will be useful, but WITHOUT ANY
+// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+// PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License along
+// with BigBlueButton; if not, see <http://www.gnu.org/licenses/>.
+
+$(document).on('turbolinks:load', function(){
+  // Checks to see if the user provided an image url and displays it if they did
+  $("#user-image")
+    .on("load", function() {
+      $("#user-image").show()
+      $("#user-avatar").hide()
+    })
+    .on("error", function() {
+      $("#user-image").hide()
+      $("#user-avatar").show()
+    })
+})