Add new IndicatorButton

src/QmlControls/IndicatorButton.qml

+import QtQuick 2.2
+import QtQuick.Controls 1.2
+
+import QGroundControl.Controls 1.0
+import QGroundControl.Palette 1.0
+
+// An IndicatorButton works just like q QGCButton with the additional support or a red/green
+// indicator on the right edge.
+
+QGCButton {
+    property bool indicatorGreen: false
+
+    Rectangle {
+        readonly property real indicatorRadius: 4
+
+        x: parent.width - (indicatorRadius * 2) - 5
+        y: (parent.height - (indicatorRadius * 2)) / 2
+        width: indicatorRadius * 2
+        height: indicatorRadius * 2
+
+        radius: indicatorRadius
+        color: indicatorGreen ? "#00d932" : "red"
+    }
+}

src/QmlControls/qmldir

 Module QGroundControl.Controls
-SubMenuButton 1.0 SubMenuButton.qml
+
 QGCLabel 1.0 QGCLabel.qml
 QGCButton 1.0 QGCButton.qml
 QGCRadioButton 1.0 QGCRadioButton.qml
@@ -7,3 +7,7 @@ QGCCheckBox 1.0 QGCCheckBox.qml
 QGCTextField 1.0 QGCTextField.qml
 QGCComboBox 1.0 QGCComboBox.qml
 QGCColoredImage 1.0 QGCColoredImage.qml
+
+SubMenuButton 1.0 SubMenuButton.qml
+IndicatorButton 1.0 IndicatorButton.qml
+