Global: Fix up button

Due to the fact that "document.body.scrollTop" was removed from newer browsers, hovering over this button was not displayed. I replaced this with "window.scrollY" which works in newer browsers. I also localized the text on it.

Web/Presenters/templates/@layout.xml

@@ -93,7 +93,7 @@
         <div class="dimmer"></div>
 
         <div class="toTop">
-            ⬆ Вверх
+            ⬆ {_to_top}
         </div>
 
         <div class="layout">

Web/static/js/scroll.js

@@ -1,5 +1,5 @@
 window.addEventListener("scroll", function(e) {
-    if(document.body.scrollTop < 100) {
+    if(window.scrollY < 100) {
         document.body.classList.toggle("scrolled", false);
     } else {
         document.body.classList.toggle("scrolled", true);

locales/en.strings

@@ -6,6 +6,7 @@
 
 "home" = "Home";
 "welcome" = "Welcome";
+"to_top" = "To top";
 
 /* Login */
 

locales/ru.strings

@@ -7,6 +7,7 @@
 
 "home" = "Главная";
 "welcome" = "Добро пожаловать";
+"to_top" = "Вверх";
 
 /* Login */