add 2 labels to the overviewpage that display Wallet and Transaction status (obsolete or current) / cleanup overviewpage XML ui-file

src/qt/overviewpage.cpp

@@ -105,6 +105,15 @@ OverviewPage::OverviewPage(QWidget *parent) :
     ui->listTransactions->setAttribute(Qt::WA_MacShowFocusRect, false);
 
     connect(ui->listTransactions, SIGNAL(clicked(QModelIndex)), this, SLOT(handleTransactionClicked(QModelIndex)));
+
+    // init "out of sync" warning labels
+    ui->labelWalletStatus->setText("(" + tr("out of sync") + ")");
+    ui->labelWalletStatus->setStyleSheet("QLabel { color: red; }");
+    ui->labelTransactionsStatus->setText("(" + tr("out of sync") + ")");
+    ui->labelTransactionsStatus->setStyleSheet("QLabel { color: red; }");
+
+    // start with displaying the "out of sync" warnings
+    showOutOfSyncWarning(true);
 }
 
 void OverviewPage::handleTransactionClicked(const QModelIndex &index)
@@ -169,3 +178,9 @@ void OverviewPage::displayUnitChanged()
     txdelegate->unit = model->getOptionsModel()->getDisplayUnit();
     ui->listTransactions->update();
 }
+
+void OverviewPage::showOutOfSyncWarning(bool fShow)
+{
+    ui->labelWalletStatus->setVisible(fShow);
+    ui->labelTransactionsStatus->setVisible(fShow);
+}