Added "Test" button in the Source panel in Preferences to test alone the RGB-D camera.

git-svn-id: http://rtabmap.googlecode.com/svn/trunk/rtabmap@1810 f169173b-cf89-36c8-b27e-44dbe73f0c83

guilib/include/rtabmap/gui/PreferencesDialog.h

@@ -235,6 +235,8 @@ private slots:
 	void openDatabaseViewer();
 	void cleanOdometryTest();
 	void testOdometry();
+	void cleanRGBDCameraTest();
+	void testRGBDCamera();
 	void calibrate();
 	void resetCalibration();