Changes as per review comment

src/js/tabs/setup_osd.js

@@ -0,0 +1,71 @@
+'use strict';
+
+TABS.setup_osd = {
+};
+
+TABS.setup_osd.initialize = function (callback) {
+    var self = this;
+
+    if (GUI.active_tab != 'setup_osd') {
+        GUI.active_tab = 'setup_osd';
+        // Disabled on merge into betaflight-configurator
+        //googleAnalytics.sendAppView('Setup OSD');
+    }
+
+    function load_status() {
+        MSP.send_message(MSPCodes.MSP_STATUS, false, false, load_html);
+    }
+
+    function load_html() {
+        $('#content').load("./tabs/setup_osd.html", process_html);
+    }
+
+    load_status();
+
+    function process_html() {
+
+        $('.tab-setup-osd .info').hide(); // requires an MSP update
+        
+        var osdVideoModes = [
+            'AUTO',
+            'NTSC',
+            'PAL'
+        ];
+
+        // translate to user-selected language
+        localize();
+
+        $('a.resetSettings').click(function () {
+            MSP.send_message(MSPCodes.MSP_RESET_CONF, false, false, function () {
+                GUI.log(chrome.i18n.getMessage('initialSetupSettingsRestored'));
+
+                GUI.tab_switch_cleanup(function () {
+                    TABS.setup_osd.initialize();
+                });
+            });
+        });
+        
+        function get_slow_data() {
+            /* FIXME requires MSP update
+            MSP.send_message(MSPCodes.MSP_OSD_VIDEO_STATUS, false, false, function () {
+                var element;
+                
+                element = $('.video-mode');
+                var osdVideoMode = osdVideoModes[OSD_VIDEO_STATE.video_mode];
+                element.text(osdVideoMode);
+                
+                element = $('.camera-connected');
+                element.text(OSD_VIDEO_STATE.camera_connected ? chrome.i18n.getMessage('osdSetupCameraConnectedValueYes') : chrome.i18n.getMessage('osdSetupCameraConnectedValueNo'));
+            });
+            */
+        }
+
+        GUI.interval_add('setup_data_pull_slow', get_slow_data, 250, true); // 4 fps
+
+        GUI.content_ready(callback);
+    }
+};
+
+TABS.setup_osd.cleanup = function (callback) {
+    if (callback) callback();
+};