Fixed js code for screen identification

Author: ishubin

CHANGELOG.md

@@ -5,6 +5,7 @@ All changes to Galen Framework project will be documented in this file
 ### Fixed
 - Blur for edges of page element image
 - Removed default ./ prefix to all spec paths
+- Screen identification on some websites
 
 ### Changed 
 - Exiting with error code by default in case there were failed tests

galen-core/src/main/java/com/galenframework/page/selenium/ScreenElement.java

@@ -36,9 +36,11 @@ public ScreenElement(WebDriver driver) {
     @Override
     public Rect calculateArea() {
         List<Long> size = (List<Long>)((JavascriptExecutor)driver).executeScript("return [Math.max(" +
+                    "document.documentElement.scrollWidth," +
                     "document.body.offsetWidth, document.documentElement.offsetWidth," +
                     "document.body.clientWidth, document.documentElement.clientWidth)," +
                     "Math.max(" + 
+                    "document.documentElement.scrollHeight," +
                     "document.body.offsetHeight, document.documentElement.offsetHeight," +
                     "document.body.clientHeight, document.documentElement.clientHeight)];"
                 );