ui: Explicity initialize night mode.

static/js/night_mode.js

@@ -55,7 +55,7 @@ var object_to_css = function (object) {
     return css.trim();
 };
 
-(function () {
+exports.initialize = function () {
     // the object to be converted to CSS.
     // this should ONLY be used if there is no obvious way to perform this action
     // by prefixing the selector with `body.night-mode`.
@@ -90,7 +90,11 @@ var object_to_css = function (object) {
         stylesheet.disabled = true;
         $("body").removeClass("night-mode");
     };
-}());
+
+    if (page_params.night_mode) {
+        exports.enable();
+    }
+};
 
 return exports;
 }());

static/js/ui.js

@@ -192,10 +192,6 @@ exports.restore_compose_cursor = function () {
 exports.initialize = function () {
     exports.set_compose_textarea_handlers();
     exports.show_error_for_unsupported_platform();
-
-    if (page_params.night_mode) {
-        night_mode.enable();
-    }
 };
 
 return exports;

static/js/ui_init.js

@@ -331,6 +331,7 @@ exports.initialize_everything = function () {
     sent_messages.initialize();
     hotspots.initialize();
     ui.initialize();
+    night_mode.initialize();
     panels.initialize();
     typing.initialize();
     starred_messages.initialize();