Several adjustments related to Qt6

* Avoid ambiguous definition during unity build on Windows
* Add missing include
* Add Qt6 to expressionparser
* Add Qt6 to nightcharts
* Replace forward define of QStringList with include <QStringList>
* Use toMSecsSinceEpoch
* Use setContentsMargins

ApplicationLibCode/Application/RiaRftPltCurveDefinition.cpp

@@ -72,7 +72,7 @@ auto RiaRftPltCurveDefinition::operator<=>( const RiaRftPltCurveDefinition& othe
     {
         if ( m_wellName == other.m_wellName )
         {
-            return m_timeStep.toTime_t() <=> other.m_timeStep.toTime_t();
+            return m_timeStep.toMSecsSinceEpoch() <=> other.m_timeStep.toMSecsSinceEpoch();
         }
         return m_wellName.toStdString() <=> other.m_wellName.toStdString();
     }

ApplicationLibCode/Application/RiaStringListSerializer.h

@@ -19,8 +19,7 @@
 #pragma once
 
 #include <QString>
-
-class QStringList;
+#include <QStringList>
 
 //--------------------------------------------------------------------------------------------------
 ///

ApplicationLibCode/Application/Tools/RiaImportEclipseCaseTools.h

@@ -18,13 +18,14 @@
 
 #pragma once
 
+#include <QStringList>
+
 #include <map>
 #include <memory>
 #include <utility>
 #include <vector>
 
 class QString;
-class QStringList;
 
 class RimIdenticalGridCaseGroup;
 class RimRoffCase;

ApplicationLibCode/Application/Tools/RiaSummaryStringTools.h

@@ -18,6 +18,8 @@
 
 #pragma once
 
+#include <QStringList>
+
 #include <set>
 #include <vector>
 
@@ -26,7 +28,6 @@ class RifEclipseSummaryAddress;
 class RimSummaryCaseCollection;
 
 class QString;
-class QStringList;
 
 //==================================================================================================
 //

ApplicationLibCode/Application/Tools/RiaSummaryTools.h

@@ -22,6 +22,7 @@
 #include "RimObservedDataCollection.h"
 
 #include <QString>
+#include <QStringList>
 
 #include <vector>
 
@@ -38,8 +39,6 @@ class RimObservedDataCollection;
 class RimSummaryCurve;
 class RimUserDefinedCalculation;
 
-class QStringList;
-
 namespace caf
 {
 class PdmObject;

ApplicationLibCode/Application/Tools/RiaTextStringTools.h

@@ -19,9 +19,9 @@
 #pragma once
 
 #include <QString>
-#include <map>
+#include <QStringList>
 
-class QStringList;
+#include <map>
 
 //--------------------------------------------------------------------------------------------------
 ///