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)

libs/qwt-6.1.5/doc/man/man3/QwtAbstractSeriesStore.3

@@ -0,0 +1,78 @@
+.TH "QwtAbstractSeriesStore" 3 "Mon Jun 1 2020" "Version 6.1.5" "Qwt User's Guide" \" -*- nroff -*-
+.ad l
+.nh
+.SH NAME
+QwtAbstractSeriesStore \- Bridge between \fBQwtSeriesStore\fP and \fBQwtPlotSeriesItem\fP\&.  
+
+.SH SYNOPSIS
+.br
+.PP
+.PP
+\fC#include <qwt_series_store\&.h>\fP
+.PP
+Inherited by \fBQwtPlotSeriesItem\fP\fC [virtual]\fP, \fBQwtSeriesStore< T >\fP\fC [virtual]\fP, \fBQwtSeriesStore< QPointF >\fP\fC [virtual]\fP, \fBQwtSeriesStore< QwtIntervalSample >\fP\fC [virtual]\fP, \fBQwtSeriesStore< QwtOHLCSample >\fP\fC [virtual]\fP, \fBQwtSeriesStore< QwtPoint3D >\fP\fC [virtual]\fP, and \fBQwtSeriesStore< QwtSetSample >\fP\fC [virtual]\fP\&.
+.SS "Protected Member Functions"
+
+.in +1c
+.ti -1c
+.RI "virtual \fB~QwtAbstractSeriesStore\fP ()"
+.br
+.RI "Destructor\&. "
+.ti -1c
+.RI "virtual void \fBdataChanged\fP ()=0"
+.br
+.RI "\fBdataChanged()\fP indicates, that the series has been changed\&. "
+.ti -1c
+.RI "virtual void \fBsetRectOfInterest\fP (const QRectF &)=0"
+.br
+.ti -1c
+.RI "virtual QRectF \fBdataRect\fP () const =0"
+.br
+.ti -1c
+.RI "virtual size_t \fBdataSize\fP () const =0"
+.br
+.in -1c
+.SH "Detailed Description"
+.PP 
+Bridge between \fBQwtSeriesStore\fP and \fBQwtPlotSeriesItem\fP\&. 
+
+\fBQwtAbstractSeriesStore\fP is an abstract interface only to make it possible to isolate the template based methods ( \fBQwtSeriesStore\fP ) from the regular methods ( \fBQwtPlotSeriesItem\fP ) to make it possible to derive from \fBQwtPlotSeriesItem\fP without any hassle with templates\&. 
+.SH "Member Function Documentation"
+.PP 
+.SS "virtual QRectF QwtAbstractSeriesStore::dataRect () const\fC [protected]\fP, \fC [pure virtual]\fP"
+
+.PP
+\fBReturns\fP
+.RS 4
+Bounding rectangle of the stored series 
+.RE
+.PP
+
+.PP
+Implemented in \fBQwtSeriesStore< T >\fP, \fBQwtSeriesStore< QwtIntervalSample >\fP, \fBQwtSeriesStore< QwtOHLCSample >\fP, \fBQwtSeriesStore< QPointF >\fP, \fBQwtSeriesStore< QwtSetSample >\fP, and \fBQwtSeriesStore< QwtPoint3D >\fP\&.
+.SS "virtual size_t QwtAbstractSeriesStore::dataSize () const\fC [protected]\fP, \fC [pure virtual]\fP"
+
+.PP
+\fBReturns\fP
+.RS 4
+Number of samples 
+.RE
+.PP
+
+.PP
+Implemented in \fBQwtSeriesStore< T >\fP, \fBQwtSeriesStore< QwtIntervalSample >\fP, \fBQwtSeriesStore< QwtOHLCSample >\fP, \fBQwtSeriesStore< QPointF >\fP, \fBQwtSeriesStore< QwtSetSample >\fP, and \fBQwtSeriesStore< QwtPoint3D >\fP\&.
+.SS "virtual void QwtAbstractSeriesStore::setRectOfInterest (const QRectF &)\fC [protected]\fP, \fC [pure virtual]\fP"
+Set a the 'rectangle of interest' for the stored series 
+.PP
+\fBSee also\fP
+.RS 4
+\fBQwtSeriesData<T>::setRectOfInterest()\fP 
+.RE
+.PP
+
+.PP
+Implemented in \fBQwtSeriesStore< T >\fP, \fBQwtSeriesStore< QwtIntervalSample >\fP, \fBQwtSeriesStore< QwtOHLCSample >\fP, \fBQwtSeriesStore< QPointF >\fP, \fBQwtSeriesStore< QwtSetSample >\fP, and \fBQwtSeriesStore< QwtPoint3D >\fP\&.
+
+.SH "Author"
+.PP 
+Generated automatically by Doxygen for Qwt User's Guide from the source code\&.