GCS: Make the icons in config gadget all .png files. The release mac build was

having issues with the SVG and 5/7 were png anyway.

ground/openpilotgcs/src/plugins/config/configgadget.qrc

@@ -16,5 +16,7 @@
         <file>images/help.png</file>
         <file>images/coptercontrol.svg</file>
         <file>images/hw_config.svg</file>
+        <file>images/hw_config.png</file>
+        <file>images/gyroscope.png</file>
     </qresource>
 </RCC>

ground/openpilotgcs/src/plugins/config/configgadgetwidget.cpp

@@ -64,7 +64,7 @@ ConfigGadgetWidget::ConfigGadgetWidget(QWidget *parent) : QWidget(parent)
     QWidget *qwd;
 
     qwd = new DefaultHwSettingsWidget(this);
-    ftw->insertTab(ConfigGadgetWidget::hardware, qwd, QIcon(":/configgadget/images/hw_config.svg"), QString("HW Settings"));
+    ftw->insertTab(ConfigGadgetWidget::hardware, qwd, QIcon(":/configgadget/images/hw_config.png"), QString("HW Settings"));
 
     qwd = new ConfigAirframeWidget(this);
     ftw->insertTab(ConfigGadgetWidget::aircraft, qwd, QIcon(":/configgadget/images/Airframe.png"), QString("Aircraft"));
@@ -79,7 +79,7 @@ ConfigGadgetWidget::ConfigGadgetWidget(QWidget *parent) : QWidget(parent)
     ftw->insertTab(ConfigGadgetWidget::ins, qwd, QIcon(":/configgadget/images/AHRS-v1.3.png"), QString("INS"));
 
     qwd = new ConfigStabilizationWidget(this);
-    ftw->insertTab(ConfigGadgetWidget::stabilization, qwd, QIcon(":/configgadget/images/gyroscope.svg"), QString("Stabilization"));
+    ftw->insertTab(ConfigGadgetWidget::stabilization, qwd, QIcon(":/configgadget/images/gyroscope.png"), QString("Stabilization"));