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/QwtTransform.3

@@ -0,0 +1,126 @@
+.TH "QwtTransform" 3 "Mon Jun 1 2020" "Version 6.1.5" "Qwt User's Guide" \" -*- nroff -*-
+.ad l
+.nh
+.SH NAME
+QwtTransform \- A transformation between coordinate systems\&.  
+
+.SH SYNOPSIS
+.br
+.PP
+.PP
+\fC#include <qwt_transform\&.h>\fP
+.PP
+Inherited by \fBQwtLogTransform\fP, \fBQwtNullTransform\fP, and \fBQwtPowerTransform\fP\&.
+.SS "Public Member Functions"
+
+.in +1c
+.ti -1c
+.RI "\fBQwtTransform\fP ()"
+.br
+.RI "Constructor\&. "
+.ti -1c
+.RI "virtual \fB~QwtTransform\fP ()"
+.br
+.RI "Destructor\&. "
+.ti -1c
+.RI "virtual double \fBbounded\fP (double value) const"
+.br
+.ti -1c
+.RI "virtual double \fBtransform\fP (double value) const =0"
+.br
+.ti -1c
+.RI "virtual double \fBinvTransform\fP (double value) const =0"
+.br
+.ti -1c
+.RI "virtual \fBQwtTransform\fP * \fBcopy\fP () const =0"
+.br
+.RI "Virtualized copy operation\&. "
+.in -1c
+.SH "Detailed Description"
+.PP 
+A transformation between coordinate systems\&. 
+
+\fBQwtTransform\fP manipulates values, when being mapped between the scale and the paint device coordinate system\&.
+.PP
+A transformation consists of 2 methods:
+.PP
+.IP "\(bu" 2
+transform
+.IP "\(bu" 2
+invTransform
+.PP
+.PP
+where one is is the inverse function of the other\&.
+.PP
+When p1, p2 are the boundaries of the paint device coordinates and s1, s2 the boundaries of the scale, \fBQwtScaleMap\fP uses the following calculations:
+.PP
+.IP "\(bu" 2
+p = p1 + ( p2 - p1 ) * ( T( s ) - T( s1 ) / ( T( s2 ) - T( s1 ) );
+.IP "\(bu" 2
+s = invT ( T( s1 ) + ( T( s2 ) - T( s1 ) ) * ( p - p1 ) / ( p2 - p1 ) ); 
+.PP
+
+.SH "Member Function Documentation"
+.PP 
+.SS "double QwtTransform::bounded (double value) const\fC [virtual]\fP"
+Modify value to be a valid value for the transformation\&. The default implementation does nothing\&.
+.PP
+\fBParameters\fP
+.RS 4
+\fIvalue\fP Value to be bounded 
+.RE
+.PP
+\fBReturns\fP
+.RS 4
+value unmodified 
+.RE
+.PP
+
+.PP
+Reimplemented in \fBQwtLogTransform\fP\&.
+.SS "virtual double QwtTransform::invTransform (double value) const\fC [pure virtual]\fP"
+Inverse transformation function
+.PP
+\fBParameters\fP
+.RS 4
+\fIvalue\fP Value 
+.RE
+.PP
+\fBReturns\fP
+.RS 4
+Modified value
+.RE
+.PP
+\fBSee also\fP
+.RS 4
+\fBtransform()\fP 
+.RE
+.PP
+
+.PP
+Implemented in \fBQwtPowerTransform\fP, \fBQwtLogTransform\fP, and \fBQwtNullTransform\fP\&.
+.SS "virtual double QwtTransform::transform (double value) const\fC [pure virtual]\fP"
+Transformation function
+.PP
+\fBParameters\fP
+.RS 4
+\fIvalue\fP Value 
+.RE
+.PP
+\fBReturns\fP
+.RS 4
+Modified value
+.RE
+.PP
+\fBSee also\fP
+.RS 4
+\fBinvTransform()\fP 
+.RE
+.PP
+
+.PP
+Implemented in \fBQwtPowerTransform\fP, \fBQwtLogTransform\fP, and \fBQwtNullTransform\fP\&.
+
+.SH "Author"
+.PP 
+Generated automatically by Doxygen for Qwt User's Guide from the source code\&.