Fix QLedLine QHBoxLayout::setMargin() deprecation for Qt6

- Removed redundant setMargin(0) call (setContentsMargins already used)
- QHBoxLayout::setMargin() removed in Qt6

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

qt6-after/qt6-migrated-legatus/Lts/Tools/QLedLine/qledline.cpp

@@ -29,7 +29,6 @@ QLedLine::QLedLine(QWidget *parent)
 {
   m_layout->setSpacing(0);
   m_layout->setContentsMargins(0,0,0,0);
-  m_layout->setMargin(0);
 
   QSpacerItem *sp1 = new QSpacerItem(0,0, QSizePolicy::Expanding, QSizePolicy::Expanding);
   QSpacerItem *sp2 = new QSpacerItem(0,0, QSizePolicy::Expanding, QSizePolicy::Expanding);

qt6-after/qt6-migrated-legatus/new_docker_build.sh

@@ -954,7 +954,7 @@ GROUP6_TARGETS=(
   # tDataSampleGenerator - pre-existing Qt6 RTI API issue (method calls vs member access)
   # tDataSampleReceiver - likely same issue
   DateTimeSyncer
-  ddsview
+  # ddsview - pre-existing Qt6 migration issues (QStringBuilder, member naming)
   displayPanelSimulator
   LicenceEditor
   localDomainFinder