* correct behavior of back button on Android

* removing of annoying debug logs on Android

client/ui/qml/main.qml

@@ -61,8 +61,12 @@ Window  {
 
     function close_page() {
         if (pageLoader.depth <= 1) {
+            if (GC.isMobile()) {
+                root.close()
+            }
             return
         }
+
         pageLoader.currentItem.deactivated()
         pageLoader.pop()
     }