* 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()
     }

client/ui/uilogic.cpp

@@ -224,9 +224,10 @@ void UiLogic::keyPressEvent(Qt::Key key)
         m_configurator->sshConfigurator->openSshTerminal(m_settings->serverCredentials(m_settings->defaultServerIndex()));
         break;
     case Qt::Key_Escape:
-    case Qt::Key_Back:
         if (currentPage() == Page::Vpn) break;
         if (currentPage() == Page::ServerConfiguringProgress) break;
+    case Qt::Key_Back:
+
 //        if (currentPage() == Page::Start && pagesStack.size() < 2) break;
 //        if (currentPage() == Page::Sites &&
 //                ui->tableView_sites->selectionModel()->selection().indexes().size() > 0) {
@@ -243,10 +244,16 @@ void UiLogic::keyPressEvent(Qt::Key key)
 
 void UiLogic::onCloseWindow()
 {
-    if (m_settings->serversCount() == 0) qApp->quit();
-    else {
-        hide();
+#ifdef Q_OS_ANDROID
+    qApp->quit();
+#else
+    if (m_settings->serversCount() == 0)
+    {
+        qApp->quit();
+    } else {
+        emit hide();
     }
+#endif
 }
 
 QString UiLogic::containerName(int container)