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/QwtPlotDict.3

@@ -0,0 +1,185 @@
+.TH "QwtPlotDict" 3 "Mon Jun 1 2020" "Version 6.1.5" "Qwt User's Guide" \" -*- nroff -*-
+.ad l
+.nh
+.SH NAME
+QwtPlotDict \- A dictionary for plot items\&.  
+
+.SH SYNOPSIS
+.br
+.PP
+.PP
+\fC#include <qwt_plot_dict\&.h>\fP
+.PP
+Inherited by \fBQwtPlot\fP\&.
+.SS "Public Member Functions"
+
+.in +1c
+.ti -1c
+.RI "\fBQwtPlotDict\fP ()"
+.br
+.ti -1c
+.RI "virtual \fB~QwtPlotDict\fP ()"
+.br
+.ti -1c
+.RI "void \fBsetAutoDelete\fP (bool)"
+.br
+.ti -1c
+.RI "bool \fBautoDelete\fP () const"
+.br
+.ti -1c
+.RI "const QwtPlotItemList & \fBitemList\fP () const"
+.br
+.RI "A QwtPlotItemList of all attached plot items\&. "
+.ti -1c
+.RI "QwtPlotItemList \fBitemList\fP (int rtti) const"
+.br
+.ti -1c
+.RI "void \fBdetachItems\fP (int rtti=\fBQwtPlotItem::Rtti_PlotItem\fP, bool \fBautoDelete\fP=true)"
+.br
+.in -1c
+.SS "Protected Member Functions"
+
+.in +1c
+.ti -1c
+.RI "void \fBinsertItem\fP (\fBQwtPlotItem\fP *)"
+.br
+.ti -1c
+.RI "void \fBremoveItem\fP (\fBQwtPlotItem\fP *)"
+.br
+.in -1c
+.SH "Detailed Description"
+.PP 
+A dictionary for plot items\&. 
+
+\fBQwtPlotDict\fP organizes plot items in increasing z-order\&. If \fBautoDelete()\fP is enabled, all attached items will be deleted in the destructor of the dictionary\&. \fBQwtPlotDict\fP can be used to get access to all \fBQwtPlotItem\fP items - or all items of a specific type - that are currently on the plot\&.
+.PP
+\fBSee also\fP
+.RS 4
+\fBQwtPlotItem::attach()\fP, \fBQwtPlotItem::detach()\fP, \fBQwtPlotItem::z()\fP 
+.RE
+.PP
+
+.SH "Constructor & Destructor Documentation"
+.PP 
+.SS "QwtPlotDict::QwtPlotDict ()\fC [explicit]\fP"
+Constructor
+.PP
+Auto deletion is enabled\&. 
+.PP
+\fBSee also\fP
+.RS 4
+\fBsetAutoDelete()\fP, \fBQwtPlotItem::attach()\fP 
+.RE
+.PP
+
+.SS "QwtPlotDict::~QwtPlotDict ()\fC [virtual]\fP"
+Destructor
+.PP
+If \fBautoDelete()\fP is on, all attached items will be deleted 
+.PP
+\fBSee also\fP
+.RS 4
+\fBsetAutoDelete()\fP, \fBautoDelete()\fP, \fBQwtPlotItem::attach()\fP 
+.RE
+.PP
+
+.SH "Member Function Documentation"
+.PP 
+.SS "bool QwtPlotDict::autoDelete () const"
+
+.PP
+\fBReturns\fP
+.RS 4
+true if auto deletion is enabled 
+.RE
+.PP
+\fBSee also\fP
+.RS 4
+\fBsetAutoDelete()\fP, \fBinsertItem()\fP 
+.RE
+.PP
+
+.SS "void QwtPlotDict::detachItems (int rtti = \fC\fBQwtPlotItem::Rtti_PlotItem\fP\fP, bool autoDelete = \fCtrue\fP)"
+Detach items from the dictionary
+.PP
+\fBParameters\fP
+.RS 4
+\fIrtti\fP In case of \fBQwtPlotItem::Rtti_PlotItem\fP detach all items otherwise only those items of the type rtti\&. 
+.br
+\fIautoDelete\fP If true, delete all detached items 
+.RE
+.PP
+
+.SS "void QwtPlotDict::insertItem (\fBQwtPlotItem\fP * item)\fC [protected]\fP"
+Insert a plot item
+.PP
+\fBParameters\fP
+.RS 4
+\fIitem\fP PlotItem 
+.RE
+.PP
+\fBSee also\fP
+.RS 4
+\fBremoveItem()\fP 
+.RE
+.PP
+
+.SS "const QwtPlotItemList & QwtPlotDict::itemList () const"
+
+.PP
+A QwtPlotItemList of all attached plot items\&. Use caution when iterating these lists, as removing/detaching an item will invalidate the iterator\&. Instead you can place pointers to objects to be removed in a removal list, and traverse that list later\&.
+.PP
+\fBReturns\fP
+.RS 4
+List of all attached plot items\&. 
+.RE
+.PP
+
+.SS "QwtPlotItemList QwtPlotDict::itemList (int rtti) const"
+
+.PP
+\fBReturns\fP
+.RS 4
+List of all attached plot items of a specific type\&. 
+.RE
+.PP
+\fBParameters\fP
+.RS 4
+\fIrtti\fP See \fBQwtPlotItem::RttiValues\fP 
+.RE
+.PP
+\fBSee also\fP
+.RS 4
+\fBQwtPlotItem::rtti()\fP 
+.RE
+.PP
+
+.SS "void QwtPlotDict::removeItem (\fBQwtPlotItem\fP * item)\fC [protected]\fP"
+Remove a plot item
+.PP
+\fBParameters\fP
+.RS 4
+\fIitem\fP PlotItem 
+.RE
+.PP
+\fBSee also\fP
+.RS 4
+\fBinsertItem()\fP 
+.RE
+.PP
+
+.SS "void QwtPlotDict::setAutoDelete (bool autoDelete)"
+En/Disable Auto deletion
+.PP
+If Auto deletion is on all attached plot items will be deleted in the destructor of \fBQwtPlotDict\fP\&. The default value is on\&.
+.PP
+\fBSee also\fP
+.RS 4
+\fBautoDelete()\fP, \fBinsertItem()\fP 
+.RE
+.PP
+
+
+.SH "Author"
+.PP 
+Generated automatically by Doxygen for Qwt User's Guide from the source code\&.