Linux add icon with setWindowIcon

-fixes #4073

qgcresources.qrc

@@ -3,11 +3,8 @@
         <file alias="opensans">resources/fonts/OpenSans-Regular.ttf</file>
         <file alias="opensans-demibold">resources/fonts/OpenSans-Semibold.ttf</file>
     </qresource>
-
     <qresource prefix="/qmlimages">
         <file alias="AirframeComponentIcon.png">src/AutoPilotPlugins/Common/Images/AirframeComponentIcon.png</file>
-
-        <!-- These are here for back compat with previous airframe meta data -->
         <file alias="AirframeFlyingWing.png">src/AutoPilotPlugins/Common/Images/FlyingWing.svg</file>
         <file alias="AirframeHexaRotorPlus.png">src/AutoPilotPlugins/Common/Images/HexaRotorPlus.svg</file>
         <file alias="AirframeHexaRotorX.png">src/AutoPilotPlugins/Common/Images/HexaRotorX.svg</file>
@@ -18,8 +15,6 @@
         <file alias="AirframeQuadRotorX.png">src/AutoPilotPlugins/Common/Images/QuadRotorX.svg</file>
         <file alias="AirframeSimulation.png">src/AutoPilotPlugins/Common/Images/AirframeSimulation.svg</file>
         <file alias="AirframeStandardPlane.png">src/AutoPilotPlugins/Common/Images/Plane.svg</file>
-
-        <!-- Aiframe images supported by airfame meta data ml image tag -->
         <file alias="Airframe/AirframeSimulation">src/AutoPilotPlugins/Common/Images/AirframeSimulation.svg</file>
         <file alias="Airframe/AirframeUnknown">src/AutoPilotPlugins/Common/Images/AirframeUnknown.svg</file>
         <file alias="Airframe/Boat">src/AutoPilotPlugins/Common/Images/Boat.svg</file>
@@ -179,6 +174,7 @@
         <file alias="TrashDelete.svg">resources/TrashDelete.svg</file>
         <file alias="XDelete.svg">resources/XDelete.svg</file>
         <file alias="XDeleteBlack.svg">resources/XDeleteBlack.svg</file>
+        <file>resources/icons/qgroundcontrol.ico</file>
     </qresource>
     <qresource prefix="/res/firmware">
         <file alias="px4.png">resources/firmware/px4.png</file>

src/main.cc

@@ -17,6 +17,7 @@
 
 #include <QtGlobal>
 #include <QApplication>
+#include <QIcon>
 #include <QSslSocket>
 #include <QProcessEnvironment>
 #include <QHostAddress>
@@ -211,6 +212,10 @@ int main(int argc, char *argv[])
     QGCApplication* app = new QGCApplication(argc, argv, runUnitTests);
     Q_CHECK_PTR(app);
 
+#ifdef Q_OS_LINUX
+    QApplication::setWindowIcon(QIcon(":/res/resources/icons/qgroundcontrol.ico"));
+#endif /* Q_OS_LINUX */
+
     // There appears to be a threading issue in qRegisterMetaType which can cause it to throw a qWarning
     // about duplicate type converters. This is caused by a race condition in the Qt code. Still working
     // with them on tracking down the bug. For now we register the type which is giving us problems here