Clear blankstate screen if conditions change

The diary, home and analysis blank state screens will
now close if rides are added.

Still need to make the train view blank state screen
close when devices and workouts are added.

src/MainWindow.cpp

@@ -983,6 +983,9 @@ MainWindow::MainWindow(const QDir &home) :
     connect(this,SIGNAL(rideAdded(RideItem*)),this,SLOT(checkCPX(RideItem*)));
     connect(this,SIGNAL(rideDeleted(RideItem*)),this,SLOT(checkCPX(RideItem*)));
 
+    // when metricDB updates check if BlankState needs to be closed
+    connect(metricDB, SIGNAL(dataChanged()), this, SLOT(checkBlankState()));
+
     // Kick off
     rideTreeWidgetSelectionChanged();
     selectAnalysis();
@@ -1504,6 +1507,31 @@ MainWindow::helpView()
     QDesktopServices::openUrl(QUrl("http://www.goldencheetah.org/wiki.html"));
 }
 
+void
+MainWindow::checkBlankState()
+{
+    // Home?
+    if (views->currentWidget() == blankStateHomePage) {
+        // should it be closed?
+        if (allRides->childCount() > 0) closeBlankHome();
+    }
+    // Diary?
+    if (views->currentWidget() == blankStateDiaryPage) {
+        // should it be closed?
+        if (allRides->childCount() > 0) closeBlankDiary();
+    }
+    // Analysis??
+    if (views->currentWidget() == blankStateAnalysisPage) {
+        // should it be closed?
+        if (allRides->childCount() > 0) closeBlankAnal();
+    }
+    // Train??
+    if (views->currentWidget() == blankStateTrainPage) {
+        // should it be closed?
+        if (appsettings->value(this, GC_DEV_COUNT).toInt() > 0 && trainDB->getCount() > 2) closeBlankTrain();
+    }
+}
+
 void
 MainWindow::closeBlankTrain()
 {