Complete Qt6 migration: full clean build green across groups G1-G12 incl. runtime plugin set

new_docker_build.sh gains Group 12 (212 GUI/Data plugins); fixes LtsUtilsGuiDds visibility (LTO-stripped exports), LtsProjectionWorkstation unity name shadow, 6 unity-off dirs (dup file-scope statics, ddsftc INTERFACE sources) and reconfigures BUILD_FILTERMANAGEMENT/BUILD_PLUGINS_SERVICEMONITOR=ON

qt6-after/qt6-migrated-legatus/Lts/Viewer/SituationMap/MapObjects/polyline.h

@@ -0,0 +1,56 @@
+/**
+  * @RDE_HEADER@
+  * Interface of Polyline
+  * $Id$
+  * $HeadURL$
+  * $Author$
+  */
+
+#pragma once
+
+#include "abstract_multi_point_map_object.h"
+
+//----------------------------------------------------------------------------
+namespace SituationMap
+{
+
+/**
+ * @brief The Polyline class supports polylines.
+ */
+class Polyline : public virtual AbstractMultiPointMapObject
+{
+
+  using BaseClass = AbstractMultiPointMapObject;
+
+public:
+
+  /* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+   * Don't use "= default" because of bug in VS2015 JT 2016/11/7
+   * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+  Polyline() : BaseClass() {;}  ///< Contructor
+
+  virtual ~Polyline() = default;  ///< Destructor
+
+  /*! \name ArrowHeads */
+  //@{
+  virtual bool arrowHeadStart() const = 0;
+  virtual void setArrowHeadStart(bool enable) = 0;
+
+  virtual bool arrowHeadEnd() const = 0;
+  virtual void setArrowHeadEnd(bool enable) = 0;
+  //@}
+
+  /*! \name Text on lineSegments */
+  //@{
+  virtual QString textOnSegment(uint segment) const = 0;
+  virtual void setTextOnSegment(uint segment, const QString &segmentText) = 0;
+  virtual void clearTextOnSegment(uint segment) = 0;
+  //@}
+
+
+};
+
+
+
+
+} // namespace SituationMap