start Qt application for calibration

Calibration/mainwindow.h

@@ -27,11 +27,12 @@ private:
     Ui::MainWindow *ui;
     QTextCursor pteConsole_cursor;
     rs2::context ctx;
-    rs2::device_list realSenseDevices;
+    rs2::device_list listRealSenseCameras;
     rs2::device realSenseCamera;
 
     // Methods
-    void listRealSenseDevices();
+    void showListRealSenseCameras();
+    void searchRealSenseDevices();
 
 private slots:
     void quitApplication();

Calibration/mainwindow.ui

@@ -58,7 +58,7 @@
        <item>
         <widget class="QLabel" name="lblDevices">
          <property name="text">
-          <string>list of Intel RealSense Camera</string>
+          <string>list of Intel RealSense Cameras</string>
          </property>
         </widget>
        </item>