Qt5 built in qwt (#570)

- qt4->qt5
- in built qt5 6.1.5 because rhel7 is not upto date with qt5, removed findqwt.cmake
- made a fix in qwt lib (qwt_plot_layout.h) to work with 5.15 and lower versions for qrect constr.
- qt5 forms fixed, qt4 many hard coding forms switched to forms including qtabwidget, scrolls etc, fonts moved to forms
 - docking option enabled by default, removed option to disable docking feature from "Mode"
- added qVersionResolve utility functions to handle compatibility before and after qt5.12
- qtplots (ian's code) takes in gain mode enable to set some settings within the class, with proper gain plot ticks
- ensure gain plots have no zooming of z axis in 2d and y axis in 1d
- removed placeholder text in qpalette in main window form as its not supportd until 5.12 (so using qt5.9 designer insted of qt5.15 to cope)
- tab order
Servers:
- fixed some error messages that were empty for fail in funcs (mostly minor as if this error, major issues)

slsDetectorGui/include/qTabDebugging.h

@@ -4,9 +4,6 @@
 #include "sls/Detector.h"
 #include "ui_form_tab_debugging.h"
 
-class QTreeWidget;
-class QTreeWidgetItem;
-
 namespace sls {
 
 class qTabDebugging : public QWidget, private Ui::TabDebuggingObject {
@@ -18,22 +15,20 @@ class qTabDebugging : public QWidget, private Ui::TabDebuggingObject {
     void Refresh();
 
   private slots:
-    void GetDetectorStatus();
     void GetInfo();
-    void SetParameters(QTreeWidgetItem *item);
+    void EnableTest();
     void TestDetector();
 
   private:
     void SetupWidgetWindow();
     void Initialization();
     void PopulateDetectors();
+    void GetFirmwareVersion();
+    void GetServerSoftwareVersion();
+    void GetReceiverVersion();
+    void GetDetectorStatus();
 
     Detector *det;
-    /** Tree Widget displaying the detectors, modules */
-    QTreeWidget *treeDet;
-    QLabel *lblDetectorHostname;
-    QLabel *lblDetectorFirmware;
-    QLabel *lblDetectorSoftware;
 };
 
 } // namespace sls