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/QwtOHLCSample.3

@@ -0,0 +1,125 @@
+.TH "QwtOHLCSample" 3 "Mon Jun 1 2020" "Version 6.1.5" "Qwt User's Guide" \" -*- nroff -*-
+.ad l
+.nh
+.SH NAME
+QwtOHLCSample \- Open-High-Low-Close sample used in financial charts\&.  
+
+.SH SYNOPSIS
+.br
+.PP
+.PP
+\fC#include <qwt_samples\&.h>\fP
+.SS "Public Member Functions"
+
+.in +1c
+.ti -1c
+.RI "\fBQwtOHLCSample\fP (double \fBtime\fP=0\&.0, double \fBopen\fP=0\&.0, double \fBhigh\fP=0\&.0, double \fBlow\fP=0\&.0, double \fBclose\fP=0\&.0)"
+.br
+.ti -1c
+.RI "\fBQwtInterval\fP \fBboundingInterval\fP () const"
+.br
+.RI "Calculate the bounding interval of the OHLC values\&. "
+.ti -1c
+.RI "bool \fBisValid\fP () const"
+.br
+.RI "Check if a sample is valid\&. "
+.in -1c
+.SS "Public Attributes"
+
+.in +1c
+.ti -1c
+.RI "double \fBtime\fP"
+.br
+.ti -1c
+.RI "double \fBopen\fP"
+.br
+.RI "Opening price\&. "
+.ti -1c
+.RI "double \fBhigh\fP"
+.br
+.RI "Highest price\&. "
+.ti -1c
+.RI "double \fBlow\fP"
+.br
+.RI "Lowest price\&. "
+.ti -1c
+.RI "double \fBclose\fP"
+.br
+.RI "Closing price\&. "
+.in -1c
+.SH "Detailed Description"
+.PP 
+Open-High-Low-Close sample used in financial charts\&. 
+
+In financial charts the movement of a price in a time interval is often represented by the opening/closing prices and the lowest/highest prices in this interval\&.
+.PP
+\fBSee also\fP
+.RS 4
+\fBQwtTradingChartData\fP 
+.RE
+.PP
+
+.SH "Constructor & Destructor Documentation"
+.PP 
+.SS "QwtOHLCSample::QwtOHLCSample (double t = \fC0\&.0\fP, double o = \fC0\&.0\fP, double h = \fC0\&.0\fP, double l = \fC0\&.0\fP, double c = \fC0\&.0\fP)\fC [inline]\fP"
+Constructor
+.PP
+\fBParameters\fP
+.RS 4
+\fIt\fP Time value 
+.br
+\fIo\fP Open value 
+.br
+\fIh\fP High value 
+.br
+\fIl\fP Low value 
+.br
+\fIc\fP Close value 
+.RE
+.PP
+
+.SH "Member Function Documentation"
+.PP 
+.SS "\fBQwtInterval\fP QwtOHLCSample::boundingInterval () const\fC [inline]\fP"
+
+.PP
+Calculate the bounding interval of the OHLC values\&. For valid samples the limits of this interval are always low/high\&.
+.PP
+\fBReturns\fP
+.RS 4
+Bounding interval 
+.RE
+.PP
+\fBSee also\fP
+.RS 4
+\fBisValid()\fP 
+.RE
+.PP
+
+.SS "bool QwtOHLCSample::isValid () const\fC [inline]\fP"
+
+.PP
+Check if a sample is valid\&. A sample is valid, when all of the following checks are true:
+.PP
+.IP "\(bu" 2
+low <= high
+.IP "\(bu" 2
+low <= open <= high
+.IP "\(bu" 2
+low <= close <= high
+.PP
+.PP
+\fBReturns\fP
+.RS 4
+True, when the sample is valid 
+.RE
+.PP
+
+.SH "Member Data Documentation"
+.PP 
+.SS "double QwtOHLCSample::time"
+Time of the sample, usually a number representing a specific interval - like a day\&. 
+
+.SH "Author"
+.PP 
+Generated automatically by Doxygen for Qwt User's Guide from the source code\&.