Make Windows happy

src/Settings/AppSettings.cc

@@ -10,6 +10,7 @@
 #include "AppSettings.h"
 
 #include <QQmlEngine>
+#include <QtQml>
 
 const char* AppSettings::appSettingsGroupName =                         "app";
 const char* AppSettings::offlineEditingFirmwareTypeSettingsName =       "OfflineEditingFirmwareType";

src/Settings/AutoConnectSettings.cc

@@ -10,6 +10,7 @@
 #include "AutoConnectSettings.h"
 
 #include <QQmlEngine>
+#include <QtQml>
 
 const char* AutoConnectSettings::autoConnectSettingsGroupName = "autoConnect";
 

src/Settings/SettingsManager.cc

@@ -10,6 +10,7 @@
 #include "SettingsManager.h"
 
 #include <QQmlEngine>
+#include <QtQml>
 
 SettingsManager::SettingsManager(QGCApplication* app)
     : QGCTool(app)

src/Settings/UnitsSettings.cc

@@ -10,6 +10,7 @@
 #include "UnitsSettings.h"
 
 #include <QQmlEngine>
+#include <QtQml>
 
 const char* UnitsSettings::unitsSettingsGroupName =     "units";
 const char* UnitsSettings::distanceUnitsSettingsName =  "DistanceUnits";

src/Settings/VideoSettings.cc

@@ -10,6 +10,7 @@
 #include "VideoSettings.h"
 
 #include <QQmlEngine>
+#include <QtQml>
 
 const char* VideoSettings::VideoSettingsGroupName = "video";