* 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
Improve robustness related to update of Summary Plot Manager
Add RimSummaryMultiPlot
Move shared code into RiaSummaryStringTools
Added "Create Summary Multi Plot" to menu of MultiPlot in project tree