Minor css fix on not found page

system/share/notfound.html

@@ -16,7 +16,8 @@
         }
 
         .footer{
-            position: absolute;
+            position: fixed;
+            left: 0px;
             bottom: 0px;
             height: 100px;
             width: 100%;

system/share/permissionDenied.html

@@ -16,7 +16,8 @@
         }
 
         .footer{
-            position: absolute;
+            position: fixed;
+            left: 0px;
             bottom: 0px;
             height: 100px;
             width: 100%;