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/QwtSeriesStore.3

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+.TH "QwtSeriesStore< T >" 3 "Mon Jun 1 2020" "Version 6.1.5" "Qwt User's Guide" \" -*- nroff -*-
+.ad l
+.nh
+.SH NAME
+QwtSeriesStore< T > \- Class storing a \fBQwtSeriesData\fP object\&.  
+
+.SH SYNOPSIS
+.br
+.PP
+.PP
+\fC#include <qwt_series_store\&.h>\fP
+.PP
+Inherits \fBQwtAbstractSeriesStore\fP\&.
+.SS "Public Member Functions"
+
+.in +1c
+.ti -1c
+.RI "\fBQwtSeriesStore\fP ()"
+.br
+.RI "Constructor The store contains no series\&. "
+.ti -1c
+.RI "\fB~QwtSeriesStore\fP ()"
+.br
+.RI "Destructor\&. "
+.ti -1c
+.RI "void \fBsetData\fP (\fBQwtSeriesData\fP< T > *series)"
+.br
+.ti -1c
+.RI "\fBQwtSeriesData\fP< T > * \fBdata\fP ()"
+.br
+.ti -1c
+.RI "const \fBQwtSeriesData\fP< T > * \fBdata\fP () const"
+.br
+.ti -1c
+.RI "T \fBsample\fP (int index) const"
+.br
+.ti -1c
+.RI "virtual size_t \fBdataSize\fP () const"
+.br
+.ti -1c
+.RI "virtual QRectF \fBdataRect\fP () const"
+.br
+.ti -1c
+.RI "virtual void \fBsetRectOfInterest\fP (const QRectF &rect)"
+.br
+.ti -1c
+.RI "\fBQwtSeriesData\fP< T > * \fBswapData\fP (\fBQwtSeriesData\fP< T > *series)"
+.br
+.in -1c
+.SS "Additional Inherited Members"
+.SH "Detailed Description"
+.PP 
+
+.SS "template<typename T>
+.br
+class QwtSeriesStore< T >"
+Class storing a \fBQwtSeriesData\fP object\&. 
+
+\fBQwtSeriesStore\fP and \fBQwtPlotSeriesItem\fP are intended as base classes for all plot items iterating over a series of samples\&. Both classes share a virtual base class ( \fBQwtAbstractSeriesStore\fP ) to bridge between them\&.
+.PP
+\fBQwtSeriesStore\fP offers the template based part for the plot item API, so that \fBQwtPlotSeriesItem\fP can be derived without any hassle with templates\&. 
+.SH "Member Function Documentation"
+.PP 
+.SS "template<typename T > \fBQwtSeriesData\fP< T > * \fBQwtSeriesStore\fP< T >::data ()\fC [inline]\fP"
+
+.PP
+\fBReturns\fP
+.RS 4
+the the series data 
+.RE
+.PP
+
+.SS "template<typename T > const \fBQwtSeriesData\fP< T > * \fBQwtSeriesStore\fP< T >::data () const\fC [inline]\fP"
+
+.PP
+\fBReturns\fP
+.RS 4
+the the series data 
+.RE
+.PP
+
+.SS "template<typename T > QRectF \fBQwtSeriesStore\fP< T >::dataRect () const\fC [virtual]\fP"
+
+.PP
+\fBReturns\fP
+.RS 4
+Bounding rectangle of the series or an invalid rectangle, when no series is stored
+.RE
+.PP
+\fBSee also\fP
+.RS 4
+\fBQwtSeriesData<T>::boundingRect()\fP 
+.RE
+.PP
+
+.PP
+Implements \fBQwtAbstractSeriesStore\fP\&.
+.SS "template<typename T > size_t \fBQwtSeriesStore\fP< T >::dataSize () const\fC [virtual]\fP"
+
+.PP
+\fBReturns\fP
+.RS 4
+Number of samples of the series 
+.RE
+.PP
+\fBSee also\fP
+.RS 4
+\fBsetData()\fP, \fBQwtSeriesData<T>::size()\fP 
+.RE
+.PP
+
+.PP
+Implements \fBQwtAbstractSeriesStore\fP\&.
+.SS "template<typename T > T \fBQwtSeriesStore\fP< T >::sample (int index) const\fC [inline]\fP"
+
+.PP
+\fBParameters\fP
+.RS 4
+\fIindex\fP Index 
+.RE
+.PP
+\fBReturns\fP
+.RS 4
+Sample at position index 
+.RE
+.PP
+
+.SS "template<typename T> void \fBQwtSeriesStore\fP< T >::setData (\fBQwtSeriesData\fP< T > * series)"
+Assign a series of samples
+.PP
+\fBParameters\fP
+.RS 4
+\fIseries\fP Data 
+.RE
+.PP
+\fBWarning\fP
+.RS 4
+The item takes ownership of the data object, deleting it when its not used anymore\&. 
+.RE
+.PP
+
+.SS "template<typename T > void \fBQwtSeriesStore\fP< T >::setRectOfInterest (const QRectF & rect)\fC [virtual]\fP"
+Set a the 'rect of interest' for the series
+.PP
+\fBParameters\fP
+.RS 4
+\fIrect\fP Rectangle of interest 
+.RE
+.PP
+\fBSee also\fP
+.RS 4
+\fBQwtSeriesData<T>::setRectOfInterest()\fP 
+.RE
+.PP
+
+.PP
+Implements \fBQwtAbstractSeriesStore\fP\&.
+.SS "template<typename T> \fBQwtSeriesData\fP< T > * \fBQwtSeriesStore\fP< T >::swapData (\fBQwtSeriesData\fP< T > * series)"
+Replace a series without deleting the previous one
+.PP
+\fBParameters\fP
+.RS 4
+\fIseries\fP New series 
+.RE
+.PP
+\fBReturns\fP
+.RS 4
+Previously assigned series 
+.RE
+.PP
+
+
+.SH "Author"
+.PP 
+Generated automatically by Doxygen for Qwt User's Guide from the source code\&.