Merge pull request #1149 from DonLakeFlyer/AppStyle

src/QGCApplication.cc

src/QGCApplication.h

src/ui/HDDisplay.cc

src/ui/HSIDisplay.cc

src/ui/HUD.cc

src/ui/HUD.h

src/ui/JoystickWidget.cc

src/ui/JoystickWidget.h

src/ui/MainWindow.cc

src/ui/MainWindow.h

src/ui/QGCDataPlot2D.cc

src/ui/QGCToolBar.cc

src/ui/SettingsDialog.cc

src/ui/designer/QGCXYPlot.cc

src/ui/designer/QGCXYPlot.h

src/ui/linechart/ChartPlot.cc

src/ui/linechart/ChartPlot.h

src/ui/linechart/LinechartWidget.cc