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)

slsDetectorServers/mythen3DetectorServer/slsDetectorFunctionList.c

@@ -195,11 +195,10 @@ int checkType() {
 }
 
 int testFpga() {
+    LOG(logINFO, ("Testing FPGA:\n"));
 #ifdef VIRTUAL
     return OK;
 #endif
-    LOG(logINFO, ("Testing FPGA:\n"));
-
     // fixed pattern
     int ret = OK;
     volatile u_int32_t val = bus_r(FIX_PATT_REG);
@@ -215,10 +214,10 @@ int testFpga() {
 }
 
 int testBus() {
+    LOG(logINFO, ("Testing Bus:\n"));
 #ifdef VIRTUAL
     return OK;
 #endif
-    LOG(logINFO, ("Testing Bus:\n"));
 
     int ret = OK;
     u_int32_t addr = DTA_OFFSET_REG;