Fix bad behaving color dialog on some platforms.

app/qml/ColorButton.qml

@@ -23,7 +23,9 @@ import QtQuick.Dialogs 1.1
 
 Item {
     id: rootItem
-    property alias color: colorDialog.color
+
+    signal colorSelected (color color)
+    property color color
     property string name
 
     ColorDialog {
@@ -31,6 +33,10 @@ Item {
         title: qsTr("Choose a color")
         modality: Qt.ApplicationModal
         visible: false
+
+        //This is a workaround to a Qt 5.2 bug.
+        onColorChanged: if (Qt.platform.os !== "osx") colorSelected(color)
+        onAccepted: if (Qt.platform.os === "osx") colorSelected(color)
     }
     Rectangle{
         anchors.fill: parent

app/qml/SettingsTerminalTab.qml

@@ -121,24 +121,18 @@ Tab{
                 RowLayout{
                     Layout.fillWidth: true
                     ColorButton{
-                        property color settingsColor: appSettings._fontColor
-                        onSettingsColorChanged: color = settingsColor
-
                         name: qsTr("Font")
                         height: 50
                         Layout.fillWidth: true
-                        onColorChanged: appSettings._fontColor = color
-                        Component.onCompleted: { color = settingsColor; }
+                        onColorSelected: appSettings._fontColor = color;
+                        color: appSettings._fontColor
                     }
                     ColorButton{
-                        property color settingsColor: appSettings._backgroundColor
-                        onSettingsColorChanged: color = settingsColor
-
                         name: qsTr("Background")
                         height: 50
                         Layout.fillWidth: true
-                        onColorChanged: appSettings._backgroundColor = color
-                        Component.onCompleted: { color = settingsColor;}
+                        onColorSelected: appSettings._backgroundColor = color;
+                        color: appSettings._backgroundColor
                     }
                 }
             }