Also reload the instance cfg

While this should work, there don't seem to be any places where the signals are listened for, so changes probably will only be available when calling Setting::get
TODO: Fix that ^

depends/settings/settingsobject.h

@@ -113,6 +113,12 @@ public:
 	 */
 	bool contains(const QString &id);
 
+	/*!
+	 * \brief Reloads the settings and emit signals for changed settings
+	 * \return True if reloading was successful
+	 */
+	virtual bool reload();
+
 signals:
 	/*!
 	 * \brief Signal emitted when one of this SettingsObject object's settings changes.