Fixed the IsRooted method

Fixed the IsRooted method to include urls starting with "~/"

Author: gpcaretti

src/AbpCompanyName.AbpProjectName.WebMpa/Views/UrlChecker.cs

@@ -8,7 +8,7 @@ public static class UrlChecker
 
         public static bool IsRooted(string url)
         {
-            if (url.StartsWith("/"))
+            if (url.StartsWith("/") || url.StartsWith("~/"))
             {
                 return true;
             }
@@ -21,4 +21,4 @@ public static bool IsRooted(string url)
             return false;
         }
     }
-}
+}