Added settings class to QML Inspector

For starters, we only remember whether the initial warning about dangers
of Live Preview was shown.

src/plugins/qmljsinspector/qmljsinspectorsettings.cpp

@@ -0,0 +1,46 @@
+#include "qmljsinspectorsettings.h"
+#include "qmljsinspectorconstants.h"
+#include <QtCore/QSettings>
+
+namespace QmlJSInspector {
+namespace Internal {
+
+InspectorSettings::InspectorSettings(QObject *parent)
+    : QObject(parent),
+      m_showLivePreviewWarning(true)
+{
+}
+
+InspectorSettings::~InspectorSettings()
+{
+
+}
+
+void InspectorSettings::restoreSettings(QSettings *settings)
+{
+
+    settings->beginGroup(QLatin1String(QmlJSInspector::Constants::S_QML_INSPECTOR));
+    m_showLivePreviewWarning = settings->value(QLatin1String(QmlJSInspector::Constants::S_LIVE_PREVIEW_WARNING_KEY), true).toBool();
+    settings->endGroup();
+}
+
+void InspectorSettings::saveSettings(QSettings *settings) const
+{
+    settings->beginGroup(QLatin1String(QmlJSInspector::Constants::S_QML_INSPECTOR));
+    settings->setValue(QLatin1String(QmlJSInspector::Constants::S_LIVE_PREVIEW_WARNING_KEY), m_showLivePreviewWarning);
+    settings->endGroup();
+}
+
+
+bool InspectorSettings::showLivePreviewWarning() const
+{
+    return m_showLivePreviewWarning;
+}
+
+void InspectorSettings::setShowLivePreviewWarning(bool value)
+{
+    m_showLivePreviewWarning = value;
+}
+
+} // namespace Internal
+} // namespace QmlJSInspector